Police are trying to trace the final steps of a man found dead on a canal path.
The body of James McGowan was discovered in Braes Avenue in Clydebank, West Dunbartonshire.
Officers are treating his death on Sunday, November 4, as unexplained.
The 49-year-old, from Knightswood, Glasgow, is believed to have been involved in an incident with another man on Howard Street.
Officers also believe he was with a third man near the St Enoch Centre and Howard Street before he was found dead.
He also boarded a bus which left Glasgow city centre at 1.50am on the day he was found dead.
Detective inspector Grant Durie said: "We know that Mr McGowan frequents Glasgow City Centre and drinks within the Scotia Bar in Stockwell Street.
"In the early hours of Sunday morning, November 4, I believe Mr McGowan was in the company of a man in the vicinity of the St Enoch Centre and Howard Street.
"I am keen to trace this man as he may have vital information regarding Mr McGowan's movements.
"The other man is described as white, aged in his late 20s, approximately 5ft 10in and medium build.
"He was wearing a dark khaki hoodie jacket, black jeans and white trainers."
Inspector Durie added: "We now also understand that Mr McGowan was involved in an incident with another man in Howard Street.
"This man is described as being white, aged in his late 30s, about 5ft in height and slim.
"He was wearing a dark jacket, black jeans and white trainers."