Jaden is believed to have been knocked off the moped he was riding, before being stabbed to death by three men in Bickley Road, shortly before 6.30pm on Tuesday, 8 January.
The attackers then drove off in a black Mercedes B Class, which was later recovered in Carlisle Road.
Detectives now believe five men were in the car that hit Jaden.
18 year old Ayoub Majdouline from Wembley has appeared at the Old Bailey this morning charged with murder.
Tags: Leyton