Police release image of potential witness over Eddie King Muthemba Kinuthia's death
He's wearing grey or blue jogging bottoms and grey trainers with a lighter sole.
Avon and Somerset police have released a photo of a man they would like to trace.
They have identified him as a possible witness as they investigate the death of Eddie King Muthemba Kinuthia, in Bristol.
Detective Chief Inspector Mark Almond is leading the Major Crime Investigation Team (MCIT) enquiry.
He said: "We have a dedicated team who are working incredibly hard to identify and speak to anyone who was in the busy Grosvenor Road area of St Paul's on the night Eddie was attacked, Friday 21 July.
"If you were there - even if you don't think you can tell us anything new - please come forward and speak to us. We really need to speak to everyone who was there, to make those checks to ensure we don't miss any information which could help to get justice for Eddie.
"I know that it’s hard for people to talk about what happened to Eddie, but our team of investigators can access help and support for people who have witnessed such awful incidents, alongside our victim and witness care teams."