BBC News
By Tracy Ollerenshaw
image copyrightTom Humberstone If you don t prove yourself you re gonna get stepped on. You can t be a wasteman.
Yusuf s been in a gang since he was 15. He wears a stab vest when he leaves the flat he shares with his mum and carries a knife in his boxers because he fears he ll be killed if he can t defend himself. I d rather be judged by 12 than carried by six, he says, borrowing a Roddy Ricch lyric to make his point.
Homelessness and domestic abuse feature heavily in Yusuf s past and he reckons there s an 80/20 chance his future will involve prison.