Police are treating the death of a man in the Perth coastal suburb of Swanbourne as murder.
Officers found the man's body in a park near the corner of Clement Street and Pine Court at 11:30 pm last night after a resident called police.
Residents reported hearing shots and the man was found with a gunshot wound to the head.
Resident Michael says he heard a loud bang about 11:00pm.
"Just what sounded like a car backfiring, I assumed, because there was just a loud bang but you know, could have been the same thing as a shot gun going off perhaps," he said.
"I was just leaving for work this morning and there are police blocking off the top and bottom of Clement Street."
"They said an incident had occurred and they are investigating further."
Detective Sergeant Graeme Johnston says police are appealing to the public to help identify the dead man who is believed to be in his 30s.
"The male is described as approximately 180 centimetres tall and of medium build," he said.
"The male is Caucasian and light skinned with brown eyes, he has thick dark hair which is below the neck, the hair at the rear of the head is dyed a lighter colour than the hair on top of his head.
"The man has a goatee beard under his chin and a dark coloured moustache."
The man also has a large scar on his right forearm.
Forensic officers and detectives from major crime are scouring the neighbourhood for clues.
A number of roads in the area have been closed and a crime scene tent has been set up outside a house on a street near where the body was found.
Police have been door-knocking homes and searching properties and a local park.