Police officer sobs in court as killer admits 2016 murder

A killer whose friend died six years after he stabbed him in the chest leaving him in a vegetative state has admitted murder. Tyrese Osei-Kofu, 24, pulled out a knife and stabbed Jamel Boyce, 17, just hours after they were joking around together at McDonald’s. Osei-Kofu was 18 at the time of the attack, which took place in Clapham on 14 October 2016. Mr Boyce was nicknamed ‘Smiley’ by fellow pupils at St Francis Xavier sixth form college in south…