A body found Saturday in Lake Mendota off Governor's Island has been identified as Jacob D. Payne, 23, of Fitchburg.
The Dane County Sheriff's Office said Payne's death is being investigated as a homicide.
The Dane County medical examiner said Monday Payne died as a result of "homicidal edged weapon violence."
The sheriff's office said Payne's body was found after 4 p.m. Saturday by a canoeist. The body was in about 5 to 6 feet of water about 30 yards from shore.
Detectives said the body had obvious signs of injury when it was recovered.
Payne did not have a permanent address, but had most recently been staying at a vehicle repair shop at 4260 Acker Road in the town of Burke, according to investigators. An older-model black BMW 528i was also found at the location.
Detectives are looking for evidence at the Acker Road location, and a dive team searched the lake near the spot where the body was found.