The man died three months after hitting his head with his fist.
Police have released a video of the suspect they want to talk to after the death of 41-year-old Petru-Sorin Doleanu on March 29.
Mr. Doleanu was with two friends at St. John’s Road, Wembley, north London, when a man approached them on December 17, 2021, at around 9 p.m.
Officers say there was an “argument” and Mr Doleanu was attacked.
According to the investigation, the cause of death was pneumonia and head injury.
Detective Inspector Jack Stillwell said: “The last few months have been extremely difficult for Petrou-Sorin’s family and friends.
“Even though it was clear for some time that his injuries were great, it is clear that his death was very difficult for them to reconcile.”
