SAN FRANCISCO (AP) -- The suspect in the slayings of five people in a San Francisco home that police initially thought might have been a murder-suicide served nearly a decade in prison for robbery and assault with a deadly weapon, records show.
State records show that Binh Thai Luc, 35, was convicted in 1998 of the armed robbery of a Chinese restaurant in San Jose in 1996. He was in prison from 1998 to 2006 then served two years of parole before being released from state custody in 2008.
Police booked Luc on five counts of murder and said he knew the victims.
Police Chief Greg Suhr said Sunday that Luc had previous gang ties, though police do not believe the killings were gang-related.
Few details have been released about the victims since their bodies were found Friday. Police said the three women and two men appeared to have been killed by blunt force trauma.
"This was a complex crime scene. We had five deceased persons apparently from blunt force trauma. We didn't know what we had," Suhr said Sunday, adding that 40 investigators were working on the case..
Investigators initially couldn't determine if a suspect was at large, and they thought at least two of the victims were shot. The chief said an "edged weapon" was involved in the slayings of the three women and two men.
The bodies were found Friday by a woman with access to the home in the Ingleside District, a middle-class neighborhood in the southern part of the city. The home near San Francisco's City College is in a thriving immigrant community, largely from Asia.
Also arrested was Luc's brother, Brian Luc, 32, on unrelated charges involving drugs, ammunition possession and violation of probation.
Brian Luc was serving three years of probation for drunken driving and firing a gun in a reckless manner, records show.
Suhr did not provide details of that arrest but said the siblings lived together.
The brothers were both being held without.
Prosecutors were still awaiting a report from police before filing charges, though an arraignment could happen as early as Wednesday, said Chief Assistant District Attorney Sharon Woo.
Jail records didn't show if either man had retained a lawyer.
The woman who discovered the bodies found one man dead in the foyer by the front door, then saw a man and a woman dead in the garage before running out and calling police. When officers arrived, they found two other deceased women.
Investigators believe four of the victims were related.
AP writer Terry Collins contributed to this report