Abdi Ali, from Sheffield, is wanted for questioning over the murder of 47-year-old Shaun Lyall, who was tortured and battered to death in his home in Cleethorpes in July 2018.
Craig Whittle, 46, of Corporation Road, Grimsby, was jailed for life over the murder but jurors in his trial were told that he did not act alone and Sheffield man Abdi Ali was also involved.
Ali, 30, who is also known as Mohammed Ismail, Black Johnny, Gulaid and Madman, was born in Somalia but brought up in Sheffield, where he lived until he moved to the east coast in the summer of 2018.
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He has links to Shirecliffe and Pitsmoor and has been described by detectives investigating Mr Lyall’s murder as a ‘significant suspect’.
Mr Lyall was battered with weapons including golf clubs, screwdrivers, a knife, scissors and a length of wood.
The motive for the attack is said to have been missing drugs and cash that Mr Lyall was supposed to have been looking after.
Despite repeated appeals for Ali to come forward to assist police with their enquiries, he continues to evade arrest.
Mr Lyall’s family runs a Facebook group where Ali’s photograph is regularly shared in the hope that somebody may recognise him and alert the police to his whereabouts.
In recent posts, his mum, Serena Lyall said: “Another day, another post.
“Still the prime suspect of my son Shaun’s brutal murder roams free and I will never stop posting until he is recognised and arrested.”
She added: “Lets flood Facebook with the picture of the prime suspect for his brutal and senseless torture and murder. Let the perpetrator know that when they took screwdrivers and golf clubs scissors and a knife and battered and butchered my son to death they murdered a somebody, not a nobody
“A somebody that will never be forgotten, a somebody that deserves justice, a somebody with a family and friends who will never give up until justice is served.”