The body of Anthony Muise, 53, was found near Trafford Park in Manchester on 24 February. A post mortem found he died from a puncture wound to the chest.
Mr Muise, who was from Ontario, was gay and is known to have socialised in various gay communities, including Manchester's Gay Village and in Edinburgh.
He is known to have spent Christmas and New Year in the Capital. Anyone with information should call police on 0161-856 1722 or Crimestoppers on 0800 555 111.