OKLAHOMA CITY — from www.foxnews.com – A suspect in the killing of four people in Oklahoma City, including a prostitute featured in the HBO reality series “Cathouse,” turned himself in to authorities on Tuesday, police said.

An arrest warrant was issued earlier for David Allen Tyner, 28, of Locust Grove, on six murder complaints, because authorities say two of the victims — 22-year olds Brooke Phillips and Milagrous Barrerra — both were pregnant.

Tyner has not been formally charged with any crime.

Phillips and Barrerra both died from gunshot wounds, police Sgt. Gary Knight said.

Phillips had worked at the Moonlite BunnyRanch, a legal brothel near Carson City, Nev. that is featured in the HBO series.

The identities of the other two victims have not been released.

Firefighters discovered the four bodies Nov. 9 in a burning home on the city’s southwest side.

Knight said police have not determined a motive in the killings, but said Tuesday investigators believe there was more than one suspect.

“We don’t believe he acted alone,” Knight said. “We’ve identified the one suspect, but that doesn’t yet tell us what his motive is for doing this.”

Tyner surrendered to the Mayes County Sheriff’s Office and is expected to be returned to Oklahoma County later Tuesday, Knight said. He said he does not know if Tyner has hired an attorney.

Efforts to identify the victims has been slow because all four bodies were badly burned, Knight said.

“Often times these investigations are like a big puzzle to solve, and certainly that can present a challenge, but not a challenge that we can’t overcome,” he said.

Police interviewed 31-year-old Jose Fernando Fierro, who rented the home and was the only person to survive the fire, but said he is not a suspect, said his attorney, Shawn Jefferson.

Jefferson said Fierro was lucky to escape, but declined to discuss details of what Fierro told police or other aspects of the investigation.