                                                              PUBLISH

               IN THE UNITED STATES COURT OF APPEALS

                       FOR THE ELEVENTH CIRCUIT


                                  No. 97-5208

                      D. C. Docket No. 96-14035-CR-JCP


THE UNITED STATES OF AMERICA,

                                                        Plaintiff-Appellee,

                                     versus

JAMES GLENN CHASTAIN,
LARRY GENE HOPKINS, et al.,

                                                        Defendants, Appellants.




                  Appeals from the United States District Court
                          Southern District of Florida

                             (December 30, 1999)



Before BIRCH and MARCUS, Circuit Judges, and ALAIMO*, Senior District Judge.

________________
* Honorable Anthony A. Alaimo, Senior U.S. District Court Judge for the Southern
District of Georgia, sitting by designation.
ALAIMO, Senior District Judge:
      Appellants, James Glen Chastain, Larry Gene Hopkins, Clyde Morris, and

Edwin Berle Rucks, Jr., appeal the jury verdict and the district court's subsequent

sentencing for various narcotic offenses in connection with the attempted importation

of marijuana into the United States. The jury found the Appellants and one additional

co-defendant1 guilty of all the crimes charged in the five-count indictment. The

counts were as follows: Count I charged all four Appellants and co-defendant Beatty

with conspiracy to import marijuana in violation of 21 U.S.C. §§ 952(a)2 and 9633;

Count II charged all four Appellants and Beatty with conspiracy to possess intent to

distribute marijuana in violation of 21 U.S.C. § 841(a)(1)4 and 8465; Count III charged

      1

      Co-Defendant William Arthur Beatty Jr. has not appealed his guilty verdict.
      2

      Section 952(a) states:

      It shall be unlawful to import into the customs territory of the United States from any
      place outside thereof (but within the United States), or to import into the United
      States from any place outside thereof, any controlled substance in schedule I or II of
      subchapter I of this chapter, or any narcotic drug in schedule III, IV, or V of
      subchapter I of this chapter. . . .
      3

      Section 963 states:

      Any person who attempts or conspires to commit any offense defined in this
      subchapter shall be subject to the same penalties as those prescribed for the offense,
      the commission of which was the object of the attempt or conspiracy.
      4

      Section 841(a)(1) states:

      Except as authorized by this subchapter, it shall be unlawful for any person
      knowingly or intentionally -- (1) to manufacture, distribute, or dispense, or possess
                                                                                     (continued...)
                                                2
Appellants Chastain and Hopkins and their co-defendant Beatty with attempt to import

marijuana in violation of 21 U.S.C. §§ 952(a) and 963 and 18 U.S.C. § 26; Count IV

charged Appellants Chastain and Hopkins and co-defendant Beatty with attempt to

possess marijuana with intent to distribute in violation of 21 U.S.C. § 841(a)(1) and

18 U.S.C. § 2; and Count V charged Appellant Chastain and co-defendant Beatty with

knowingly displaying false and misleading marks on a federally registered aircraft

with the intent to conspire to import marijuana into the United States in violation of

21 U.S.C. § 963, 49 U.S.C. § 46306(c)(2) and (c)(3)7 and 18 U.S.C. § 2.

      4
      (...continued)
      with intent to manufacture, distribute, or dispense, a controlled substance;
      5

      Section 846 states:

      Any person who attempts or conspires to commit any offense defined in this
      subchapter shall be subject to the same penalties as those prescribed for the offense,
      the commission of which was the object of the attempt or conspiracy.
      6

      Section 2 states:

      (a) Whoever commits an offense against the United States or aids, abets, counsels,
      commands, induces or procures its commission, is punishable as a principal; (b)
      Whoever willfully causes an act to be done which if directly performed by him or
      another would be an offense against the United States, is punishable as a principal.
      7

      Section 46306(c)(2) and (c)(3) states:

      (c) Controlled substance criminal penalty.

      (2) A person violating subsection (b) of this section shall be fined under title 18,
      imprisoned for not more than 5 years, or both, if the violation is related to
      transporting a controlled substance by aircraft or aiding or facilitating a controlled
                                                                                      (continued...)
                                                3
       On March 26, 1997, the jury returned a verdict finding Chastain guilty as to

Counts I-V; Hopkins guilty as to Counts I-IV; and Morris and Rucks guilty as to

Counts I and II. All of the Appellants were sentenced by the district court and are

presently incarcerated.8

       Each Appellant appeals several aspects of his trial, conviction, and/or sentence.

Appellants present a total of eight different issues for the Court’s consideration: (1)

whether the district court properly exercised its discretion in denying defense

counsel’s request to question potential jurors during voir dire about fundamentals of

the criminal justice system; (2) whether the district court properly denied Appellants’


       7
        (...continued)
       substance violation and the transporting, aiding, or facilitating–

       (A) is punishable by death or imprisonment of more than one year under a law of the
       United States or a State; or

       (B) that is provided is related to an act punishable by death or imprisonment for more
       than one year under a law of the United States or a State related to a controlled
       substance (except a law related to simple possession of a controlled substance).

       (3) A term of imprisonment imposed under paragraph (2) of this subsection shall be
       served in addition to, and not concurrently with, any other term of imprisonment
       imposed on the individual.
       8

       The district court sentenced the Appellants as follows: Chastain received concurrent terms
of 97 months’ imprisonment as to Counts I-IV, two years’ probation as to Count V, four years’
supervised release and a $350 special assessment; Hopkins received concurrent terms of 87 months’
imprisonment as to Counts I-IV, five years’ supervised release and a $300 special assessment;
Morris received concurrent terms of 78 months’ imprisonment as to Counts I and II, four years’
supervised release and a $200 special assessment; and, Rucks received concurrent terms of 78
months’ imprisonment as to Counts I and II, four years’ supervised release and a $200 special
assessment.
                                                 4
motion for a mistrial based on the government’s violation of F.R.C.P. Rule 16, and

whether the district court properly exercised its discretion in allowing a United States

Customs Service agent to testify as an expert on drug smuggling; (3) whether

Appellants were entitled to judgment of acquittal (or reversal of their convictions) due

to an alleged variance between the charges in the indictment and the government’s

proof at trial; (4) whether there was sufficient evidence to support the convictions of

the four Appellants; (5) whether the district court abused its discretion by refusing to

give a multiple conspiracy instruction, and a theory of defense instruction proffered

by Appellant Morris; (6) whether the district court properly exercised its discretion

in denying defense counsel’s motion for a mistrial based upon a government witness’

answer to a question on cross-examination, and whether the district court properly

exercised its discretion in denying Morris’ motion for a mistrial based upon the

government’s attempt to question him about a prior conviction on tax evasion; (7)

whether Appellant Rucks was entitled to dismissal of the indictment or a new trial

based upon his claim of outrageous governmental misconduct; and (8) whether the

district court properly applied the sentencing guidelines in sentencing Appellants

Chastain, Hopkins and Rucks.

       With respect to the first seven issues, we have examined the record and we

affirm the district court's decisions on those issues for the reasons discussed in this


                                           5
opinion. However, with respect to the final issue involving the application of Federal

Sentencing Guideline §2D1.1(b)(2), we will reverse and remand.



                                   BACKGROUND

      The evidence adduced during the trial discloses that the government first

became aware of this conspiracy on February 1, 1996, when an airplane, co-piloted

by Appellant Chastain and Co-Defendant Beatty, slid off the runway and crashed at

the Placid Lakes Airport in Highlands County, Florida. The plane was carrying

several plastic containers of aviation fuel, an illegal fuel transfer system, burlap bags,

duct tape, an aircraft global positioning system, a hand-held radio, and aeronautical

maps and charts for air travel between Jamaica and Florida. Furthermore, all

passenger seats had been removed.

      When Highlands County Sheriff’s Deputy Kevin Awbrey arrived at the scene,

he saw Beatty standing next to the aircraft. Deputy Awbrey noticed that the aircraft’s

Federal Aviation Administration (“FAA”) registration number had been altered with

duct tape. He stepped away from the aircraft several times during the initial

investigation, leaving Beatty alone, and later noticed that the duct tape used to alter

the plane’s FAA number had been removed.




                                            6
      Soon after the plane crash, a flight instructor saw a man walk from behind the

newly constructed hangars and attempt to enter an old pick-up truck. The flight

instructor later identified the young man as Appellant Chastain. The pick-up truck

was locked and Chastain asked the flight instructor to help him locate the keys to the

truck and the latter agreed to do so. The flight instructor asked Chastain whether he

had been on the plane that had just crashed and Chastain answered affirmatively. At

the crash site, the instructor found Beatty sitting on the plane’s wing. He asked Beatty

for the truck keys and returned to the area where he had left Chastain, but found that

Chastain and the truck were gone. Broken glass lay on the ground where the driver’s

side of the truck had been.

      Deputy Ouverson, the crime scene detective, arrived at the crash site and saw

Beatty tearing up a business card. Ouverson recovered most of the card, pieced it

back together, revealing a partial phone number. Officers subsequently obtained

telephone records that indicated that someone from Beatty’s home had called a

telephone number in Jamaica on January 11, 1996, that was almost identical to the one

on the business card that Beatty had destroyed.

      A number of items found on the crashed place were owned by or connected to

the four Appellants or Beatty. The hand-held radio that was found had been

purchased on January 13, 1996 by Eugene Prince, Beatty’s long-time casual


                                           7
acquaintance. The Magellan global positioning system found in the plane had been

purchased by Beatty on January 16, 1996. Plastic fuel drums in the aircraft were

similar to four fifteen gallon fuel drums that Appellant Rucks had obtained in late

1995, as well as three additional fuel drums that Appellant Morris had obtained from

the same source in early 1996. On January 23, 1996, Beatty purchased 33.8 gallons

of fuel from the Fort Pierce Air Center and ordered an overnight tie-down for an

aircraft bearing the same registration number as the aircraft that Beatty and Chastain

crashed on February 1, 1996.

      In January of 1996, Appellant Hopkins attempted to borrow $50,000 from Lee

Clardy in order to purchase an airplane. Hopkins told Clardy that the plane he wanted

to buy with the borrowed money would be used to haul drugs and that Clardy would

double his investment. Hopkins offered Clardy titles to vehicles and other property

as collateral, but Clardy declined to make the loan.

      A few days later, Hopkins was able to borrow $40,000 from George Godwin.

As collateral, Godwin received title to a race car trailer, two pick-up trucks and a boat.

On January 22, 1996, Hopkins purchased a Piper Cherokee aircraft from Lyle Travis

for approximately $40,000. About one week later, Beatty and Chastain slid off the

runway at Lake Placid Airport.




                                            8
      After the plane crash, Hopkins told Godwin that if anyone were to ask him

about the property Godwin received as collateral for the loan, he should say that he

had purchased the property from Hopkins. Hopkins also told Godwin that, if he were

questioned in court about Hopkins’ purchase of the plane, he should say that Hopkins

had been interested in planes for years.

      Clardy read about the crash in the newspaper and, later, on Godwin’s property,

saw some of the property that Hopkins had offered to him as collateral when he had

declined to lend money to Hopkins. Clardy then informed local law enforcement

officials about the offer Hopkins previously had made to him.

      Three or four weeks after the crash, Morris and Rucks approached a

confidential information (“CI”) for the United States Customs Service at Fort Drum

Store, a local convenience store and restaurant. Rucks asked the CI whether he could

obtain a plane and pilot to fly to Jamaica to pick up a load of marijuana waiting there.

The CI answered that he could.

      The next day, Rucks and Morris again met with the CI and inquired whether he

had contacted a pilot. The CI said he had left a message for the pilot, but had not yet

received a response. After this second meeting, the CI contacted Deputy Sheriff Larry

Williams and informed him of his conversations with Morris and Rucks.




                                           9
      A few days later, Rucks approached the CI and asked him again whether he had

made contact with a pilot. The CI said he had not, but added that the pilot would have

to be paid $30,000. A week later, Rucks approached the CI for a fourth time and

asked about the pilot. Two days later, Morris told the CI “he needed to get a hold of

a pilot as soon as he could because they done lost $40,000 on an airplane that crashed

in February, and that they had the pot on an airstrip waiting on them and they had to

get it off before they lost it.” Rucks then described to the CI a “buy back plan”

whereby the Jamaicans were to sell half of the marijuana and then buy the other half

from the CI and the pilot.

      The next day the CI met with Rucks in front of the Fort Drum Store and Rucks

again asked him whether he had made contact with the pilot but told him they were

only able to come up with $10,000 for the pilot. The CI said he would discuss the

matter with the pilot. The CI, however, had never contacted any pilot subsequent to

his discussions with Morris and Rucks. Although the CI met with them at later times,

they did not have any further discussions regarding transporting marijuana.

      Agent Bateman, the U.S. Customs pilot with whom the CI had previously

worked, contacted the CI to inquire whether there was any further information on the

February 1 plane crash. The CI replied in detail of the meetings he had had with

Morris and Rucks. The CI agreed to help with the investigation of the February 1


                                         10
accident and to act as a “go-between” between Agent Bateman and Morris and Rucks

and to record all subsequent conversations.

      On June 21, 1996, the CI met with Morris in the parking lot of the Fort Drum

Store. During this taped conversation, the CI stated that he needed money and asked

whether Morris could get anything started. Morris replied that he still needed a plane.

The CI told Morris that he had a plane and a pilot, and was ready to go. At this time

Morris talked at length about the February 1st crash, saying that only the pilot had

been caught and charged merely with having an expired license and carrying an

unsecured load.

      The CI called Morris on June 25, 1996 to determine whether Morris had

successfully contacted the Jamaicans. Morris had tried in vain to set up a deal but

agreed to meet the CI the next day at the Fort Drum Store. Rucks showed up instead

and reiterated that they were having difficulties contacting the Jamaicans.

      On June 27, Morris told the CI they wanted to bring in 2,000 pounds of

marijuana from Jamaica. On June 29, the CI met with Rucks on property belonging

to Rucks’ family that would be used as a landing strip for the plane. Rucks stated that

the strip was about one-half mile long, but that modifications could be made to make

it more amenable for landing a plane. Rucks insisted the strip was suitable and had

been used previously to bring in a load.


                                           11
       Later that same day, the CI again met with Rucks at Rucks’ family property

with Agent Bateman, who was introduced as the pilot. Agent Bateman suggested

modifications to the strip to facilitate the landing of the plane, instructed Rucks on the

materials he would need, and stated that he also needed a relief pilot. Rucks replied

that he already had obtained much of the materials that Bateman requested and that

Chastain was willing to serve as the relief pilot, just as he did on the plane that crashed

in February. Bateman told Rucks that July 5, 1996, would be a good day for him

because it was a holiday weekend and he would have access to his employer’s plane.

Rucks provided Bateman with a detailed description of the landing strip in Kingston,

Jamaica, showed him the general location of the landing strip on a map, and promised

to provide him the coordinates at a later date. On June 30, Rucks delivered a fuel

pump to the CI, that he said had come from Beatty.

       On July 3 the CI met with Rucks and Chastain. Rucks said that Beatty had yet

to make contact with their suppliers in Jamaica but that Beatty would be in Jamaica

when the deal “went down.” Nothing happened over the July 4th weekend because

Appellants were unable to contact their suppliers.

       On July 8 Rucks and Chastain delivered fuel drums to the CI and Agent

Bateman. All four men discussed possible pick-up dates, given an impending storm.

Chastain agreed to serve as Bateman’s co-pilot and both Rucks and Chastain said they


                                            12
would try to contact their sources in Jamaica. On this occasion, Chastain discussed

Hopkins’ involvement in the February 1 attempt, complaining that Hopkins had

waited until the last minute to buy the plane and then bought the cheapest plane he

could find. He also stated they were acting hastily and not making good decisions, as

evidenced by their decision to send Hopkins to Jamaica.

      Law enforcement officers arrested Appellants and co-defendant Beatty on July

9 and 10, 1996, before any flight was made to Jamaica to pick up the load of

marijuana.

      This appeal followed the trial, jury verdict, and subsequent sentencing of all

four Appellants.



                                  DISCUSSION

                                     Voir Dire

      Appellant Hopkins contends that the district court erred in not allowing defense

counsel to pose additional questions to the prospective jurors following some

comments made by a few potential jurors during the voir dire. Hopkins points to the

statements of jurors, Elizabeth Murphy and Luba Snook as the source of the alleged

contamination of the jury pool. Murphy stated that because her son was a police

officer and a law student, she “might be prejudiced in some way” in favor of the


                                         13
government. Snook stated that in her opinion the criminal justice system was more

solicitous of criminals than victims; she also made equivocal statements about her

ability to be fair. She said that while she would try to be fair, “if they were caught red-

handed doing something wrong, they’re wrong. If my kid did something wrong and

I see him do it, he’s wrong, and he’s going to be punished for it.” That having been

stated, the prospective jurors, including Murphy and Snook, when questioned by the

court, indicated they could follow the court’s instructions at the end of the case as to

the applicable law, even if they disagreed with it. The two prospective jurors who

made these statements, however, were ultimately dismissed.

      The conduct of a voir dire examination is upheld unless there is an abuse of

discretion. See United States v. Miller, 758 F.2d 570, 572 (11th Cir. 1985). “Where

statements made by potential jurors at voir dire raises the specter of ‘potential actual

prejudice’ on the part of the remaining panel members, ‘specific and direct

questioning is necessary to ferret out those jurors who would not be impartial.’”

United States v. Dennis, 786 F.2d 1029, 1043-44 reh’g granted and denied in part, 804

F.2d 1208 (11th Cir. 1986) (quoting, United States v. Cory, 625 F.2d 704, 707 (5th

Cir. 1980), cert. denied, 450 U.S. 925 (1981)) (emphasis added). However, statements

by potential jurors that do not constitute “potential actual prejudice," do not “mandate




                                            14
additional voir dire.” Dennis, 786 F.2d at 1044 (quoting, United States v. Tegzes, 715

F.2d 505, 508 (11th Cir. 1983)).

      Upon review of the record, it appears that the statements made by Murphy and

Snook were somewhat common place and relatively innocuous. The women were

simply raising their own doubts as to their ability to be fair. They did not express any

opinion as to the guilt or innocence of Hopkins or the other Appellants. In sum, their

statements did not relate to any facts of the case, or parties, or witnesses involved in

the case. The effect of these statements is highly speculative in nature and Appellants

did not show that they rise to the level of “potential actual prejudice,” much less that

the district court judge abused his discretion in refusing to allow defense counsel to

ask specific jurors questions regarding pure principles of law. Accordingly, the action

of the district court with respect to the conduct of the voir dire is affirmed.



                                 Violation of Rule 16

      Appellants Chastain, Hopkins, and Morris contend that the district court erred

in allowing United States Customs Agent Richard Morris to testify as an expert

witness, and that the court should have granted their motion for a mistrial because the

government violated Federal Rule of Criminal Procedure 16(a)(1)(E) with respect to

this witness. The record indicates that the government failed to disclose its intention


                                           15
to call Agent Morris as an expert witness, although he had been listed as a lay witness.

The Appellants argue that they were, thus, substantially prejudiced. The government

responds that it was only through inadvertence that Morris was not disclosed as a

potential expert witness, and, more significantly, did not violate defendants’

substantial rights, because the record discloses that the trial judge afforded Appellants

sufficient opportunity to interview the expert in the midst of the trial, thus allowing

them access to adequate information to cross examine the witness. In addition,

because of a break in the trial, Appellants had ample opportunity — three days — to

find a rebuttal witness, nor was there a proffer as to what a rebuttal witness would

have testified. None of the Appellants moved for a continuance.

      “Violations of Rule 16 will result in a reversal of conviction only if such a

violation prejudices a defendant’s substantial rights.” United States v. Perez-Garcia,

904 F.2d 1534,1546 (11th Cir. 1990). In determining the proper remedy for the

government’s violation of discovery rules, the Court must consider “how the violation

affected the defendant’s ability to present a defense.” United States v. Noe, 821 F.2d

604, 607 (11th Cir. 1987). Furthermore, “where it is apparent ... that [the] defense

strategy may have been determined by the failure to [disclose], there should be a new

trial.” Id. (citing, United States v. Rodriguez, 799 F.2d 649, 654 (11th Cir. 1986) (per

curiam) quoting, United States v. Padrone, 406 F.2d 560, 561 (2nd Cir. 1969) (per


                                           16
curiam). In other words, actual prejudice must be shown. The Court concludes that

Appellants have not shown that the failure to disclose the existence of this expert

adversely affected their ability to present a defense. Appellants were not substantially

prejudiced and the denial of a motion for mistrial was appropriate.

      Although the Court finds there has been no violation of Rule 16, the Court is

not impressed with the government’s behavior and actions in this case.              The

government listed the agent as a lay witness and then elicited expert testimony when

he testified. There is no excuse for violating Rule 16 even when it results, as it did in

this case, in no prejudice to the Appellants.

      With respect to Agent Morris, the Appellants also argue that the district court

abused its discretion when it permitted him to testify as an expert. The district court’s

decision on the competency of, and the weight to be accorded to, the testimony of an

expert is a highly discretionary one.       See Increase Minority Participation by

Affirmative Change Today v. Firestone, 893 F.2d 1189, 1195 (11th Cir. 1990).

Therefore, the decision to admit Agent Morris' testimony as an expert can only be

reversed if the decision is manifestly erroneous. Appellants do not challenge the

extensive experience of Agent Morris in the areas about which he testified. He had

been a pilot for more than 21 years. He was also a flight instructor. Agent Morris

received extensive training in drug smuggling using airplanes at the United States


                                           17
Customs Service where he had spent ten years investigating drug smuggling. He had

previously testified six times as an expert in the area of smuggling drugs by plane. He

was clearly qualified as an expert.

      Federal Rule of Evidence 702 permits expert testimony to be admitted when it

is helpful to the finder of fact in determining a fact in issue. Morris’ testimony was

used to educate the jurors on the general techniques of drug smugglers and about

certain modifications that were made to Beatty’s airplane that would make the plane

more suitable for drug smuggling.        This information was clearly relevant to

establishing the existence of a conspiracy to smuggle marijuana by using an airplane.

Neither the court’s decision to consider Agent Morris an expert, nor its decision to

admit his testimony regarding drug smuggling techniques, including specific

modifications to airplanes, can be considered an abuse of discretion. For that reason,

the court’s decision to admit Agent Morris’ testimony is affirmed.




                                          18
      Material Variance Between Indictment Charges and Proof at Trial

       Appellants contend that the government failed to prove the single conspiracy

to import and possess marijuana as charged in the indictment. They argue that the

government's evidence actually showed multiple conspiracies and, thus, there was a

material variance between the indictment and the proof advanced at trial. The

standard of review for whether there is a material variance between the allegations in

the indictment and the facts established at trial is twofold: First, whether a material

variance did occur, and, second, whether the defendant suffered substantial prejudice

as a result. See United States v. Prince, 883 F.2d 953, 959 (11th Cir. 1989).

       In determining whether a jury could have found a conspiracy, three factors are

considered: first, was there a common goal;9 second, what was the nature of the

criminal scheme; and third, what was the overlap of the participants in the various

dealings of the conspiracy. See Calderon, 127 F.3d 1327, see also United States v.

Coy, 19 F.3d 629, 633 (11th Cir. 1994), United States v. LaSpresa, 956 F.2d 1027,

1031 (11th Cir. 1992). Further, “[N]o material variance will exist if a reasonable trier

of fact could have found beyond a reasonable doubt the existence of a single

conspiracy charged in the indictment.” United States v. Starrett, 55 F.3d 1525, 1552


       9

        Under United States v. Calderon, 127 F.3d 1314, 1327 (11th Cir. 1997), “‘common’ means
‘similar’ or ‘substantially the same’ rather than ‘shared’ or ‘coordinate.’”
                                             19
(11th Cir. 1995). (quoting United States v. LeQuire, 943 F.2d 1554, 1561 (11th Cir.

1991) cert. denied, 505 U.S. 1223 (1992).

      As the evidence must be viewed in the light most favorable to the government,

the Court finds that a reasonable jury could have concluded that a single conspiracy

existed among Appellants and their co-defendant Beatty, as was charged in the

indictment. Application of the elements of a conspiracy to these facts is illustrative

of the Court’s finding. First, the importation of marijuana was a common goal to all

the Appellants. Second, the nature of the underlying scheme was the same insofar as

the Appellants and their co-defendant were attempting to import marijuana from

Jamaica via an airplane. The fact that one airplane was used unsuccessfully and a

different airplane was contemplated for the second attempt is not so significant as to

preclude a reasonable jury from finding that a single conspiracy existed over the entire

period of time. Third and last, there was sufficient overlap among the participants.

There was evidence that co-defendant Beatty and Appellant Chastain played important

roles in both attempts. The jury also heard evidence that Appellants knew each other

personally and were well aware of each other’s roles and activities in the importation

scheme.

      Moreover, Appellants Hopkins and Chastain do not contend that they were

surprised unfairly and Morris fails to show he was deprived of fair notice of the


                                          20
crimes charged. See United States v. Glinton, 154 F.3d 1245, 1252 (11th Cir. 1998).

Accordingly, Appellants are not entitled to prevail on this issue.



                                      Jury Instructions

       Appellants Chastain, Hopkins, and Rucks contend that the district court erred

in denying their request for a multiple conspiracy instruction. Such an instruction is

required when the indictment charges several defendants with one overall conspiracy,

but the proof at trial indicates a jury could reasonably conclude that some of the

defendants were involved only in separate conspiracies unrelated to the overall

conspiracy charged in the indictment. See Calderon, 127 F.3d at 1328.

       While generally it is for the jury to determine whether one or several

conspiracies existed, United States v. Becker, 569 F.2d 951, 961 (5th Cir.), cert.

denied, 439 U.S. 865, 1048 (1978),10 whether the defense produced sufficient

evidence to sustain an instruction such as a multiple conspiracy is a question of law.

See Calderon, 127 F.3d at 1328. The district court, in determining whether an

instruction for a multiple conspiracy should be given, considers whether there is

sufficient evidence for a reasonable jury to conclude that some of the defendants were

       10

       The Eleventh Circuit, in the en banc decision, Bonner v. City of Pritchard, 661 F.2d 1206,
1209 (11th Cir. 1981), adopted as precedent decisions of the former Fifth Circuit rendered prior to
October 1, 1981.
                                                21
involved in separate conspiracies unrelated to the overall conspiracy charged in the

indictment. Id. However, as discussed above, the government was able to prove a

single conspiracy involving all of the Appellants. To the extent there might have been

subgroups operating pursuant to the general conspiracy, the evidence, viewed in the

best light for the government, demonstrated they were all acting in furtherance of one

overarching plan. Id. The district court, therefore, did not err in refusing to give the

requested multiple conspiracy instruction.

      Appellant Morris also argues that the district court erred in refusing to give his

requested theory of defense jury instruction. The district court's refusal to give a

requested "theory of defense" instruction is reviewed for abuse of discretion. See

United States v. Morales, 978 F.2d 650, 652 (11th Cir. 1992). Thus, the refusal to

give a requested jury instruction warrants reversal only if the requested instruction (1)

was correct; (2) was not substantially covered by the charge actually given; and (3)

dealt with some point in the trial so important that failure to give the requested

instruction seriously impaired the defendant’s ability to conduct his defense. Id.

accord United States v. Camejo, 929 F.2d 610, 614 (11th Cir. 1991). Beyond that,

“the district court has broad discretion in formulating its charge as long as the charge

accurately reflects the law and the facts.” See United States v. Winchester, 916 F.2d




                                           22
601, 604 (11th Cir. 1990) (quoting, United States v. Gold, 743 F.2d 800, 819 (11th

Cir. 1984)).

      Morris’s proposed charge, however, merely served to emphasize the law

regarding reasonable doubt as to the existence of specific intent to enter a conspiracy.

Those issues were covered sufficiently by the district court’s actual jury instructions.

Morris’s proposed instruction was no more than a summary of Morris’s defense rather

than the exposition of a pertinent legal theory. The district court did not commit error

in refusing to give Appellant Morris’s requested instruction.



                            Sufficiency of the Evidence

      Appellants challenge the sufficiency of the evidence to sustain their

convictions. The Court reviews sufficiency of the evidence de novo, with the

evidence being viewed in the light most favorable to the government. See Starrett, 55

F.3d at 1541. A conviction must be upheld unless the jury could not have found the

defendant guilty under any reasonable construction of the evidence. See United States

v. Camargo-Vergara, 57 F.3d 993, 997 (11th Cir. 1995).             To the extent that

Appellants’ argument depends upon challenges to the credibility of witnesses, the jury

has exclusive province over that determination and the court of appeals may not revisit

this question. See United States v. Hewitt, 663 F.2d 1381, 1386 (11th Cir. 1981)


                                          23
(where the testimony of the witnesses was not incredible as a matter of law, [the court]

must accept this determination by the jury).

      Contrary to the contentions of the Appellants, the record, as shown above,

demonstrates that the government presented more than sufficient evidence from which

a reasonable jury could conclude, beyond a reasonable doubt, that Appellants

committed the actions for which they were convicted. The most glaring example of

this is the fact that the government informant repeatedly tape-recorded the Appellants,

at various times, discussing in detail the plans to import marijuana from Jamaica by

plane. Accordingly, Appellants’ contentions on this issue are wholly without merit.



                                Motions for Mistrial

      Appellant Hopkins contends that the district court erred in denying his motion

for a mistrial following government Agent Bateman's response to a question on cross-

examination. Hopkins argues that Agent Bateman's response was impermissible

because it was a comment on Hopkins’ constitutional right to remain silent and, thus,

requires a reversal of his conviction. The Court reviews a refusal to grant a mistrial

based on a comment regarding a defendant’s right to remain silent and improper

questioning on a previous conviction for abuse of discretion. See United States v.

Dodd, 111 F.3d 867, 869 (11th Cir. 1997).


                                          24
      To determine whether there has been an impermissible comment upon a

defendant’s right not to testify at trial, the district court must consider, whether the

statement was manifestly intended or was of such character that a jury would naturally

and necessarily take it to be a comment on the failure of an accused to testify. Id. It

follows logically, then, that the court must consider the circumstances in which the

statement was made. See United States v. Vera, 701 F.2d 1349, 1362 (11th Cir. 1983)

(modified on other grounds, United States v. Taylor, 144 F.3d 1423 (11th Cir. 1988)).

In this case, the exchange occurred between Hopkins’ counsel, Mr. Garland, and the

witness, Agent Bateman:

      MR. GARLAND: Did you do any actual investigation of the incident
      other than – such as speak to the owner of the airplane or the previous
      owner of the airplane, TNT Aviation, Lyle Travis?
                                        ***
      AGENT BATEMAN: Lyle Travis. I never spoke with Mr. Travis, and
      when Mr. Hopkins was arrested, he wanted his attorney – matter of fact,
      his first attorney –

      MR. GARLAND: I object, it’s non-responsive.

      THE COURT: Objection overruled. Go ahead and answer, sir.

      AGENT BATEMAN: Mr. Hopkins was – when we – when I first saw
      him was at an attorney’s office and we agreed to let him finish meeting
      and he would be surrendered to our office, the attorney instructed us not
      to ask him any questions, and therefore, I did not.

      Agent Bateman's comments were direct responses to defense counsel’s open-

ended question, and cannot be construed to be “manifestly intended” to be a comment

                                          25
on Hopkins’ exercise of his privilege not to testify, and a rational jury could not take

it to be so. Plainly, the trial judge was well within his discretion to reach that

conclusion. The district court’s decision, therefore, to deny Hopkins’ motion for a

mistrial is affirmed.

       Appellant Morris also moved for a mistrial based upon the government's

attempt to question him about a prior conviction for tax evasion. A defendant is

entitled to a grant of mistrial only upon a showing of substantial prejudice. See

United States v. Funt, 896 F.2d 1288, 1295 (11th Cir. 1990). Here, the record clearly

indicated that the district court acted immediately to block the government from

pursuing this line of questioning. Furthermore, it also gave the jury a curative

instruction. The Court noted previously that it will not overturn a lower court's refusal

to grant a mistrial where the record shows that appropriate curative instruction were

given, “unless the evidence is so highly prejudicial as to be incurable by the trial

court's admonition.” Id. (citing, United States v. Tenario-Angel, 756 F.2d 1505, 1512

(11th Cir. 1985)) quoting, United States v. Slocum, 708 F.2d 587, 598 (11th Cir.

1983). In the circumstances of this case, the court acted properly and was well within

its discretion when it denied Morris’s motion for a mistrial.



                        Outrageous Government Misconduct


                                           26
       Appellant Rucks contends that outrageous conduct by the government warrants

a dismissal of the indictment. Specifically, his allegation is that the entire conspiracy

was manufactured by the government.

       A conviction may be overturned when the government is involved in the

criminal activity only when the government’s involvement “violates fundamental

fairness and shocks the universal cause of justice.” United States v. Walther, 867 F.2d

1324, 1339 (11th Cir. 1989). Otherwise, the government’s “infiltration of criminal

activity is 'a recognized and permissible means of investigation.’” United States v.

Tobias, 662 F.2d 381, 386 (5th Cir. Unit B 1981) (citing United States v. Russell, 411

U.S. 423, 432 93 S.Ct. 1637, 1643 36 L.Ed.2d 366 (1973)).11

       The government’s conduct in this case obviously was well within

constitutionally permitted limits.          Appellant Rucks was a predisposed active

participant as evidenced by his participation in the events leading up to the failed first

attempt. Furthermore, there was sufficient evidence presented to the jury showing that

it was Rucks who approached the government's informant about obtaining a plane and

a pilot, thus directly contradicting Rucks’ claim that the government manufactured the




       11

       Decisions of the former Fifth Circuit, Unit B, rendered after September 30, 1981, are binding
precedent in this circuit. See Stein v. Reynolds Securities, Inc., 667 F.2d 33,34 (11th Cir. 1982).
                                                27
crime.        There is no evidence of the sort of extreme circumstances of outrageous

government conduct needed even to constitute minimally a due process violation.



                        Application of the Sentencing Guidelines

         Appellants Chastain, Hopkins, and Rucks challenge their sentences imposed by

the district court. The district court’s factual findings for sentencing purposes under

the Federal Sentencing Guidelines are reviewed for clear error, but the district court’s

application of the Guidelines to those facts is reviewed de novo. See United States v.

Cannon, 41 F.3d 1462, 1466 (11th Cir. 1995).

         Appellant Chastain claims that the district court erred in its application of a

two-level upward adjustment, pursuant to § 3B1.3 of the Guidelines, for use of a

"special skill."12 Chastain claims that this guideline does not apply to a person who

flies airplanes only as a “hobby." The commentary to § 3B1.3, to which the court

must defer, however, defines “special skill” as any “skill not possessed by members

of the general public and usually requiring substantial education, training or licensing.

Examples would include pilots, lawyers, doctors, accountants, chemists, and

demolition experts.” U.S.S.G. § 3B1.3, Application No. 3 (emphasis added). Neither


         12

         § 3B1.3 states: "If the defendant. . . used a special skill, in a manner that significantly
facilitated the commission or concealment of the offense increase by two-levels.
                                                28
the plain language of § 3B1.3, nor anything in the Commentary suggests a distinction

between “professional” and “amateur." If in fact it did, it would be a distinction

without a difference, for in either case, the harm, namely, the “abuse [of] . . . special

skills to facilitate significantly the commission . . . of a crime” occurs whether

Chastain was a professional or an amateur pilot. Id., Commentary, Background. It

is undisputed that without a competent pilot, whether a “professional” or an

“amateur,” this conspiracy would have been inconceivable.             To exclude non-

professionals possessed with the same skills and, therefore, the same ability to

“facilitate” the commission of crimes would be to attribute an element of arbitrariness

and irrationality to the Federal Sentencing Guidelines. Therefore, the district court’s

application of § 3B1.3 to Chastain was proper.

      Appellant Hopkins argues that the district court used an incorrect amount of

marijuana in determining his sentence. He contends that the amount used at

sentencing was greater than what the planes involved could have carried physically.

In the record, however, there is evidence to support a conspiracy to import

approximately 1500 pounds of marijuana. Therefore, the district court's application

of between 800 and 900 pounds in determining the sentence was not clearly

erroneous.




                                           29
      Appellants also challenge the district court's application of a two-level upward

adjustment for their plan to use a private plane to import narcotics, pursuant to

U.S.S.G. § 2D1.1(b)(2). §2D1.1(b)(2) states, inter alia, that "If the defendant

unlawfully imported or exported a controlled substance under circumstances in which

an aircraft other than a regularly scheduled commercial air carrier was used to import

or export the controlled substance, . . . increase by two levels."

      Appellants argue that the enhancement was inappropriate because no actual

importation or "use" occurred on these facts. The district court below, in applying the

enhancement, endorsed a broad interpretation of the plain language of the guidelines,

relying on the terms "Attempt or Conspiracy" found in the title of § 2D1.1.

      The Ninth Circuit, previously confronted with interpreting §2D1.1(b)(2), held

that the intent to use a private plane was not enough to warrant the two-level

enhancement. See United States v. Jolson, 7 F.3d 174, 180 (9th Cir. 1993) (cert.

denied, 510 U.S. 1019). In Appellants’ case, there was clearly an attempt and a

conspiracy, on which the district court relied in applying this enhancement. However,

the plain language of the guideline that uses the past tense, viz "used to import,"

cannot be ignored. When the language of the guideline is clear, it is not necessary to

look elsewhere for interpretation. Here, the language of the guideline clearly

contemplates a completed event, an actual importation. That did not occur in this


                                          30
case. The Court will not look to the title of a guideline to explain what is quite clear

in its text.

       Thus, the district court's reliance on the terms in the title as explanatory of the

guideline is misplaced. The two-level increase as applied to these three Appellants,

therefore, was an error of law. Because it was incorrect for the district court to apply

the enhancement, the sentences of Appellants Chastain, Hopkins, and Rucks are

remanded for re-sentencing.



                                   CONCLUSION

       For the foregoing reasons we AFFIRM the judgment of the district court on all

issues presented in this appeal, except that we REVERSE and REMAND for

sentencing with respect to the erroneous application of a two-level increase pursuant

to § 2D1.1(b)(2) of the Federal Sentencing Guidelines.




                                           31
