  Social media monitoring by law enforcement is becoming commonplace, but
little is known about what software packages for it do. Through public records
requests, we obtained log files from the Corvallis (Oregon) Police Department's
use of social media monitoring software called DigitalStakeout. These log files
include the results of proprietary searches by DigitalStakeout that were
running over a period of 13 months and include 7240 social media posts. In this
paper, we focus on the Tweets logged in this data and consider the racial and
ethnic identity (through manual coding) of the users that are therein flagged
by DigitalStakeout. We observe differences in the demographics of the users
whose Tweets are flagged by DigitalStakeout compared to the demographics of the
Twitter users in the region, however, our sample size is too small to determine
significance. Further, the demographics of the Twitter users in the region do
not seem to reflect that of the residents of the region, with an apparent
higher representation of Black and Hispanic people. We also reconstruct the
keywords related to a Narcotics report set up by DigitalStakeout for the
Corvallis Police Department and find that these keywords flag Tweets unrelated
to narcotics or flag Tweets related to marijuana, a drug that is legal for
recreational use in Oregon. Almost all of the keywords have a common meaning
unrelated to narcotics (e.g.\ broken, snow, hop, high) that call into question
the utility that such a keyword based search could have to law enforcement.
