Latest from Ronke Phillips reporting from court:
The trial has begun of two teenagers accused of murderingKwame Ofosu-Asare in broad daylight on the Moorlands housing estate in Brixton.
The prosecution says Kwame was innocent victim of a poisonous andsenseless feud between two rival gangs.
Kwame and his friend were ambushed and chased until they were cornered in cul de sac. The friend got away but Kwame was caught and stabbed 14 times.
The prosecution alleges the attack had its roots in an attack by the Gas gang on a member of the TN1 gang earlier same day.
The defendants were allegedly caught on CCTV attempting unsuccessfully to buy a knife. They later persuaded someone to buy it for them