Rhys was cradled by his mother as he lay dying
Witness appeal
The 19-year-old is being questioned by detectives on suspicion of murder. A second 19-year-old suffered minor injuries as he tried to escape arrest.
A further two males aged 15 and 16, and two females aged 15 and 18, were arrested in Croxteth and Norris Green.
Officers would also like to speak to a woman who was seen pushing a pram near the scene shortly before Rhys was shot.
'Close proximity'
Det Supt Dave Kelly, the senior investigating officer, said: "We know from our inquiries there was a woman pushing a pram minutes before Rhys was killed and we believe she will have passed within close proximity to the killer.
"She is described as wearing white wide-legged trousers with a dark tunic style top, almost like a smock.
"She had dark hair, possibly tied back and was pushing a dark coloured pram at about 1925 BST."
Spectators and players at Everton's home game held a minute's applause at Goodison Park where Rhys's favourite team were playing Blackburn Rovers.
Walking home alone
Rhys's parents, Melanie and Stephen, and his brother, Owen, stood with Everton manager David Moyes as cheers erupted from the nearly 40,000-strong crowd.
Mr Moyes said: "It is something we are all bitterly saddened about, we feel so much for the family, and this needs to be sorted out quickly. It is something that should not be allowed to happen in this city."
Police have said Rhys "was in the wrong place at the wrong time".
Mr Kelly said that the bike-riding teenage killer emerged at the back of the Fir Tree pub from an estate behind the pub.
He said that the boy cycled at the back of the pub for a few minutes before firing three bullets in Rhys's direction - one of which passed through the boy's neck.
Mr Kelly said Rhys was walking home alone when he was killed and that he might have been shot by a revolver.
Reassure witnesses
A 15-year-old boy, arrested in the Norris Green area of Liverpool on Friday, remains in police custody.
Two boys aged 14 and 18, earlier arrested on suspicion of murder, were released on Thursday night.
Detectives investigating the shooting have appealed for witnesses to "stand up and be counted".
Chief Superintendent Chris Armitt said residents must "examine their consciences" and take a stand against gang culture.
We have ways of protecting members of the public who come forward with information
Ch Supt Chris Armitt, Merseyside Police
Speaking at a press conference near the spot where Rhys was shot, Ch Supt Chris Armitt said: "We understand that people are concerned about giving information to the police, we understand that people are frightened, that's natural.
"What I want to say to people is, listen, they've got to stand up and they've got be counted.
Text information
"We have ways of protecting members of the public who come forward with information, we can protect their identity. If they have evidence that needs to go before court that can be done using something called special protective measures."
We have lost our world, the world has lost a good guy
Stephen Jones, father
Parents speak of loss
Officers have been handing out leaflets in the area with a special number for young people to text information anonymously.
Police have said that they are examining an abandoned bicycle, found in an area with a different postcode to the shooting.
Officers also confirmed descriptions of the killer's firearm, describing it as a black handgun with a long barrel.
Some 100 officers are working on the investigation, supported by 200 staff from the Merseyside Police gun crime unit, Matrix, which was set up two years ago to tackle the problem.
Detectives are treating the inquiry as Category A Plus - the "most serious" of crimes.
Seis adolescentes han sido arrestados para interrogarlos en relación al asesinato de Rhys Jones en el área de Croxteth de Liverpool, ocurrido el miércoles por la noche.

Los arrestos de cuatro adolescentes de sexo masculino (de edades de 15, 16 y dos de 19) y dos de sexo femenino (edades 15 y 18) hacen llegar hasta siete al número de personas retenidas en custodia, junto con un quinceanero arrestado ayer, y hacen llegar hasta nueve al número total de arrestos hasta ahora. Cinco de los adolescentes fueron arrestados esta mañana, mientras que el restante fue arrestado más tarde durante el día. Los arrestos fueron todos hechos en las áreas de Croxteth y Norris Green en Liverpool.

El Detective Superintendente David Kelly dijo que uno de los arrestados que tiene 19 años de edad está siendo tratado en el hospital por heridas menores que sufrió durante el arresto, luego de que cayó de un primer piso tratando de escapar.

Kelly también dijo que a la policía le gustaría hablar en particular con una mujer de cabello oscuro, diciendo: "La mujer podrías ser potencialmente una testigo clave. Sabemos por nuestros interrogatorios que había una mujer llevando un cochecito de niño minutos antes de que Rhys fuera matado y creemos que habría pasado cerca del asesino".

Luego añadió que el asesino emergió de un complejo urbano detrás del pub Fir Tree y anduvo en su bicicleta detrás del pub por algunos minutos antes de disparar los tres tiros, uno de los cuales le dio en el cuello a Rhys, que estaba volviendo a su casa luego de jugar fútbol.

La policía está examinando una bicicleta encontrada abandonada ayer, pero aún no ha encontrado el arma asesina, que se estima que es una pistola negra de barril largo.

El Jefe Superintendente Chris Armitt pidió la comunidad local para que "examinen sus consciencias" y tomen una posición frente a la cultura pandillera.

"Entendemos que la gente esté preocupada por dar información a la policía, entendemos que la gente esté asustada, eso es natural", añadió luego. "La policía no ha conseguido los niveles de información sobre estos temas claves que esperábamos y que queremos". Además, aseguró a miembros del público que cualquier testigo que diga lo que sepa será protegido, diciendo que nadie con información deberá "levantarse y ser contado".