SAN FRANCISCO (AP) — Six years ago, an immigration judge ordered the deportation of Binh Thai Luc, the man now suspected of killing five people in a San Francisco home last week, according to federal authorities.

Luc was to return to his native Vietnam after serving time in prison for armed robbery and assault, but he was never deported because the Vietnamese government didn't provide the documents needed to process his removal from the U.S., officials said Monday.

The 35-year-old Vietnam citizen now faces murder charges in the deaths of five people whose bodies were found Friday in what police initially thought was a murder-suicide.

Luc was contacted by ICE agents while he was serving his sentence for robbery and assault with a deadly weapon at San Quentin State Prison. After he was ordered to be deported, the agency sought the official documents it needed to return him to Vietnam, but never got them, said Gillian Christensen, ICE's deputy press secretary.