Alexander Lynch's death is being treated as suspicious
Police are trying to trace the last movements of a man found dead in a canal in Manchester city centre.
The body of Alexander Lynch, 46, was found by underwater search teams near Ducie Street on Friday morning.
Although the body showed no obvious signs of trauma, detectives are treating his death as suspicious. Post-mortem tests revealed he drowned.
Officers are now trying to piece together where Mr Lynch was in the hours leading up to his death.
Officers are also still keen to speak to a man who made the telephone call to the emergency services when he saw the body.
Anyone else who was in the area between 2200 BST on Thursday and 0230 BST the next day is also urged to contact police.
Det Supt Mark Powell, leading the inquiry, said: "We are still in the early stages of our inquiry and our efforts are concentrated on Alexander's movements on the night of Thursday 2 October 2008 leading up to his death in the early hours of the next day.
"It is vital that anyone who has any information comes forward so we piece together exactly what happened to Alexander.
"We know that this particular area of the canal is sometimes used by men looking for sex with other men and therefore some witnesses may be reluctant to come forward.
"We are not interested in why you were there, only what you saw. You can come to us in confidence and we will treat you with discretion and respect."
Mr Lynch had connections with Manchester, Glasgow and Wrexham.