OAKLAND -- An Alameda County prosecutor on Tuesday asked a jury to find an Oakland man guilty of first-degree murder in the 2012 killing of a Pittsburg man inside an East Oakland drug house.

"Nephew killed Billy -- there is no other evidence," deputy district attorney Glenn Kim said at the trial of 35-year-old Kenyus "Nephew" Walker, accused of fatally shooting 39-year-old Billy Brooks sometime in late September 2012. Brooks' deteriorating body was discovered wrapped in a trap in the back seat of his own car abandoned near Arroyo Viejo Park on Oct. 7, 2012.

Defense attorney Thomas Broome argued that Walker is innocent of the murder and has been wrongly implicated as the killer by one of the heavy drug users who admitted to disposing of Brooks' body.

"What you have is a parade of liars who can't keep their facts straight," Broome said of several witnesses who testified that they saw Walker shoot Brooks in the head with a sawed-off shotgun after Brooks and a prostitute came to a house in the 2300 block of 80th Avenue looking to score heroin.

Walker was the drug house's security guard "enforcer" and didn't like how Brooks came in being loud and obnoxious, acting like he owned the place, Kim said.

Brooks was looking to make contact with the resident drug dealer and his longtime friend Karnell Marshall, who was in a bedroom when Brooks and Walker began to argue and was unaware Brooks was at the house until after he was already dead.

Walker felt disrespected by Brooks and so he aimed his gun at him and pulled the trigger, but the gun didn't fire. He then disabled the gun's safety mechanism and fire again, the second time, successfully, Kim said.

"Billy said, 'you really going to shoot me,' and the response was the aiming the gun and pulling the trigger," Kim said. "(Walker) blew that man's head off."

Marshall, Anthony Allen, Tameka Tolliver, and Lawrence and Mechelle Landry, who were in the house at the time of the shooting, all pleaded to felony accessory after the fact and are scheduled to be sentenced after the trial for their roles in cleaning up after the killing and getting rid of Brooks' body.

Broome said the group conspired against Walker to pin the homicide on him.

Jury deliberations began Tuesday afternoon in the court of Judge C. Don Clay.

Contact Malaika Fraley at 925-234-1684. Follow her at Twitter.com/malaikafraley.