A reward of up to £10,000 is being offered for information about the murder of 48-year-old Scott Wilkinson in Walton.
Mr Wilkinson’s body was found in the Thames near Donkey Island, near Waterside Drive, on July 28, 2016.
It is believed he had been fishing there the night before.
A post-mortem examination concluded he died from head trauma.
Independent charity Crimestoppers is offering the reward for information leading to the arrest and conviction of the person or people responsible.
Annabelle Goodenough, South East regional manager for Crimestoppers, said: “To lose a partner and family member is immensely distressing, but to not have answers as to why they died or to know who was responsible is particularly difficult.
“We urge anyone with information to contact us, 100 per cent anonymously, on 0800 555 111, safe in the knowledge that you will never have to give a statement to police or go to court.”
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here