Shop assistant killer acted in self defence

A teenager who stabbed a shop assistant to death in a park told the Old Bailey today (TUES) he was ‘frightened’ and acted in self defence. Darnell Martin, 19, claimed he only took out his knife to try and stop 21 year-old David Darko trying to hit him with a child’s rounders bat. He admitted he had a previous conviction for carrying a knife but said it was only for his own protection. Martin said he had previously been threatened…