The man was found by police in his West Street flat on Boxing Day (26 December), but later died in hospital. Two women have since been arrested on suspicion of murder, as well as a man in connection with the death.
Alderman McDowell has said: “This is a terrible tragedy and an appalling loss of life. Christmas is meant to be a time of joy, peace, and togetherness, and for something so horrific to happen around this time is especially difficult to come to terms with. The town is in a state of shock right now.
“My thoughts and sympathies are with the victim’s family and loved ones at what’s sure to be an unthinkably difficult time.
“I would implore anyone with any information that may help police in their investigations to please get in touch with them, or report it anonymously via Crimestoppers.”