Abdi Ali, aged 29, is wanted for questioning over the killing of 47-year-old Shaun Lyall in Cleethorpes, Lincolnshire, in July last year.
Ali, who has spent most of his life in Sheffield after moving from Somalia, was living in Cleethorpes when Mr Lyall was killed.
Humberside Police have now issued a re-appeal for information as they step up their efforts to try and track him down.
In a statement, the force said: “As our investigations continue, we are still looking for Abdi Ali, 29, in connection with the murder of Mr Lyall.
“Abdi Ali is originally from Somalia and has links to the Grimsby area, Sheffield, London, Lancashire, South Yorkshire, Merseyside, Manchester, Milton Keynes, Lincolnshire, and Cleveland.