Detectives from the Homicide and Major Crime Command are investigating after a man who was seriously assaulted in Lambeth died of his injuries.
Police were called to Albert Square, SW8 at approximately 17:50hrs on Thursday, 31 May, to reports of two men fighting.
Officers and the London Ambulance Service attended and found a 52-year-old man suffering from facial injuries.
He was taken to a central London hospital by London’s Air Ambulance, where he spent several weeks in a critical condition.
He died on Thursday, 14 June.
A post-mortem examination was carried out at Greenwich Mortuary on Wednesday, 20 June, and gave the cause of death as head injury.
The victim has not been formally identified, but his family are content for him to be named as Mark Tremain, of Albert Square, SW8.
A 20-year-old man was arrested at the scene on suspicion of grievous bodily harm. He has been bailed to return to a police station on a date in late June.
Detective Chief Inspector John Massey, of the Homicide and Major Crime Command, said: “Sadly Mr Tremain has now died and we need the public’s help to understand all the circumstances that led up to his death. I would appeal to any witnesses, or anyone who has any information about the incident, to come forward. Any information about this inquiry could be vital.”
Any witnesses or anyone with any information is asked to call the incident room on 020 8721 4868 or contact via Twitter @MetCC. Quote CAD6616/31May