Police have named the man who was found dead in a flat in Hull.
The body of Steve Henry Larvin, 40, of Marlborough Terrace, Norfolk Street, was discovered by officers on Tuesday.
It followed information from a man who walked into the city's Queens Gardens Police Station earlier that evening.
Police believe Mr Larvin was last seen drinking with friends in pubs in Hull on Saturday evening.
They want to hear from anyone who saw anything suspicious around Marlborough Terrace between Saturday and 2045 BST on Tuesday.
A 43-year-old man, who was arrested on suspicion of murder, has been released on police bail pending further enquiries.