Kavan Brissett, aged 21, was stabbed on August 14, 2018 and died in hospital four days later but his killer remains at large.
The popular young man and talented boxer was knifed in his chest on the Grammar Street car park in Upperthorpe and managed to stagger to nearby Langsett Walk, where he was found by a member of the public a short time later and the alarm was raised.
Despite emergency first aid at the scene and surgery in hospital, Kavan could not be saved and a murder probe was launched.
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A trawl of CCTV cameras in and around the area led to the discovery of footage of man running away from the crime scene but he has never been tracked down.
Four men were charged with conspiracy to commit robbery as part of the police investigation into the murder but so far nobody has been charged over Kavan’s death.
Detectives want to trace Sheffield man Ahmed Farrah, who is believed to hold vital information about the killing.
He was captured on CCTV at the Royal Hallamshire Hospital, where he was treated for facial injuries, on the same night that Kavan was stabbed.
He returned to the hospital the following day but then disappeared.
Farrah, who is also known as ‘Reggie’, was last seen in Cardiff the month after Kavan’s death but then went to ground.
His friends, relatives and acquaintances have all been visited by the police and harbouring notices have been served, warning that anyone helping him evade arrest faces prosecution.
Farrah’s passport has never been found by police officers searching for him, so it is possible that he may now be abroad.
In a recent Facebook post, Kavan’s grieving mum, Emma Hamilton, said: “This man is still wanted, out there somewhere living his life with not care in the world.
“No words to my frustration in locating this man.
“All I want is some sort of closure and justice for my son instead of living in limbo.
“Obviously we live in world of ‘out sight out mind’, nobody could care less. Last few years have shown me that otherwise this man would have been caught.”