Humberside Police has stepped up its appeal to find 28-year-old Abdi Ali in connection with the murder of Shaun Lyall.
Shaun was found dead at a property on Sidney Street on 17 July.
Humberside Police have so far arrested four people in connection with his death.
One has been released on bail, two released under investigation and one released unconditionally.
Abdi Ali is originally from Somalia and has links to the Grimsby area, Lancashire, South Yorkshire, Merseyside, Manchester, Milton Keynes, Lincolnshire, and Cleveland.
He is quite recognisable as he has a distinctive gold tooth at the front of his mouth.
Crimestoppers have offered a reward of up to £5,000 to anyone who can give information to the charity about Abdi Ali’s whereabouts.
Crimestoppers can be contacted 100% anonymously on 0800 555 111 or via their anonymous online form at Crimestoppers-uk.org.