Police have named a man who was stabbed to death as Wesley Brown.
The 40-year-old, of no fixed address, was found in a home in Humber Close in Corby, Northamptonshire, at about 00:30 BST on Saturday.
He died in Kettering General Hospital shortly before 02:00.
Two men who were arrested on suspicion of murder have been released without charge but have been bailed in relation to separate drug related offences, police said.
A post-mortem examination revealed Mr Brown died from a stab wound.
Det Ch Insp Joe Banfield said: "This remains a fast-moving investigation during which we have now identified a third potential suspect and we are focusing our efforts on arresting that individual and bringing them to justice."