Rapper became killer at 15

A 15-year-old boy who stabbed a drug dealer to death after recording a violent rap song with his friends is facing jail. The teenager plunged a Predator combat knife into Adam Chambers’ heart as the victim rode his moped through a car park near Troughton Road, Charlton, southeast London. Doctors performed open heart surgery on Chambers in the street after he collapsed but the 30-year-old was pronounced dead at the scene at 6.27pm on 13 June. Hours earlier the killer,…