Detectives are today questioning a man about the suspected murder of Christopher Butler in Southsea.
The 32-year-old was arrested yesterday after Mr Butler, who was 27, was found dead at an address in Waverley Road on January 1.
A 23-year-old woman and a 33-year-old man, who were arrested on Saturday suspicion of murder, have been bailed until February 17.
Anyone with information is asked to call the Major Investigation Team at Fratton police station on 101, quoting Operation Turtle. Alternatively call the anonymous Crimestoppers on 0800 555 111.