Mohammed Adan Nurr, 35, was found dead at a flat in Spitalfields, east London, on Friday 23 December 2011.
He had suffered internal bleeding to the liver after being attacked the previous evening near the juntion of Hanbury Street and Daplyn Street.
Mr Nurr, a Somalian national, refused help and returned to a friend's flat at Arthur Deakin House on Woodseer Street. Police were called to the address at around 9.50am and the victim was pronounced dead at the scene.
Shahidul Islam, 18 [28/5/93], of Hanbury Street, and Abdul Qayum, 18 [18/1/93], of Hobsons Place, Spitalfields, were both charged with murder on January 1, 2012. The charge was later downgraded to manslaughter and Moshin Ahmed, 18 [14/5/94], of Spelman Street, Shoreditch, was added to the indictment.
They all went on trial at the Old Bailey on August 13, 2012. The prosecution case is that Mr Nurr was confronted by a group of six men at a park in Hanbury Street after a night out drinking.
After an argument about cigarettes, the group chased Mr Nurr until he tripped over railings. The victim was then kicked as he lay helpless on the ground. He twice refused help from ambulance crews and was found dead in bed the next morning.
On September 4, 2012, the jury convicted Islam and Qayum of manslaughter. Islam and Qayum were both sentenced to eight-and-a-half years detention. Ahmed was cleared of manslaughter but convicted of affray and given a suspended prison sentence.