Police have released an image of a man they wish to question following the murder of Antonios Antoniadis in Lewisham.
Officers rushed to Florence Terrace at around 9.20am on Sunday July 7 following reports of an assault.
The victim, Antonios Antoniadis, aged in his late 20s, was rushed to hospital with stab wounds.
Despite receiving two weeks of specialist intensive care treatment, Mr Antoniadis succumbed to his injuries on Sunday July 21.
A post-mortem examination revealed the preliminary cause of death as multiple organ failure from a stab wound to the thigh.
Detective Chief Inspector Kate Blackburn, who is leading the investigation, said: "We have already charged two people in relation to Antonios' murder.
“We are now issuing an image of a 19-year-old man named Joshua McCorquodale who we believe may have vital information and we would like to speak with him urgently. McCorquodale may have injuries and we are concerned for his welfare.
"Please, if you have seen McCorquodale call 999 quoting Operation Botany or if you wish to remain completely anonymous then call Crimestoppers- your identity will be protected."
Police are urging anyone with information about the attack to come forward. They can call 101 quoting the above reference or contact Crimestoppers anonymously on 0800 555 111.
