Video surveillance and DNA samples bolstered evidence that a 27-year-old convicted sex offender forced a woman off a BART train in San Leandro and sexually assaulted her on the tracks before fleeing, officials said Friday.

Meini Foster, a transient from San Francisco, was arraigned Friday afternoon in Alameda County Superior Court in Hayward on six felony counts including, forcible rape, sodomy by use of force, forcible oral copulation, rape by use of drugs and kidnapping to commit a sex crime.

If convicted, Foster faces life in prison without the possibility of parole, said Lt. Robert McManus of the San Leandro Police Department.

His next court date will be on Jan. 12, where he is expected to enter a plea, said officials from the Alameda County district attorney’s office.

A woman in her mid-20s was on her way home from a work holiday party in San Francisco on Dec. 15 when she was attacked, according to court records.

Video surveillance from the night of the heinous crime shows the victim as stumbling, swaying back and forth and struggling to keep her balance due to intoxication, court documents say.

She boarded a BART train at 11 p.m. at the Powell Street station in San Francisco. Surveillance footage shows Foster pushing her off the train nearly two hours later at the Bay Fair station in San Leandro, McManus said.

Foster dragged the victim onto the railroad tracks between Hesperian Boulevard and Halcyon Drive, a half mile from the BART station, McManus said.

The woman yelled for help and attempted to fight Foster off as he forced her to orally copulate him while making verbal threats, court documents show.

He then raped and sodomized her before leaving her in the mud and fleeing, according to court documents.

The woman was able to walk to a residential neighborhood about 3 a.m. on the 700 block of Begonia Drive and knocked on doors for help, McManus said.

Residents thought she was a burglar and called police, according to court documents. When police found her, she was transported to Highland Hospital.

“We got forensic evidence from the survivor,” McManus said, adding that the DNA collected was a match for Foster, who was on probation for a previous sex crime in San Francisco.

Court records show he was also on probation in Alameda County for a vandalism conviction.

Foster was arrested without incident on Dec. 27 by BART police when they located him at the Civic Center BART station in San Francisco, McManus said.

He was booked in the Santa Rita Jail in Dublin, where he is being held without bail.

Kio Pak, a sexual assault response and recovery team program coordinator for Alameda Health System, said consent must be explicit and intoxication can prevent someone from giving consent.

“Surviving a sexual assault is probably the worst crime that anybody could ever get through,” McManus said.

Sarah Ravani is a San Francisco Chronicle staff writer. Email: sravani@sfchronicle.com Twitter: @SarRavani