Shortly after the shooting, BART shut down West Oakland Station and for several hours trains did not stop there. Riders who parked at West Oakland on Saturday before the shooting had to take AC transit buses to the station from the MacArthur and Lake Merritt stops to pick up their cars.
The station reopened late Saturday night and it was open again Sunday morning as usual, BART spokesman Jim Allison said.
BART investigators have pulled video from surveillance cameras in the train car where the shooting took place and from West Oakland Station, Ledford said, adding that police interviewed many witnesses who were on the train.
The shooting renews questions about the challenges of maintaining security on public transit, where passengers are essentially free to carry whatever they want, included loaded firearms, aboard trains, buses and ferries. Muni has been the scene of two such incidents in recent years, including last April's Tommy Clayton shooting. In September 2013, a San Francisco State student named Justin Valdez was killed in an apparently random shooting by a fellow passenger on a light-rail vehicle.
BART's Allison says the agency has tried to prepare for trouble on its trains.
"Since 9/11 all BART frontline employees have received extensive training on how to react to emergencies," Allison said in an email. "BART police have increased patrols inside stations."
There have been many other steps taken to keep BART safe that aren't public, Allison said, including new alarms and increased video surveillance. BART is working with other agencies on security drills and new detection devices for various chemical or biological agents, Allison said.
He emphasized, though, that it's not possible to check every person who enters the system. "Imagine having to show up at a station an hour before your train," Allison said.
"Because it's not practical for BART to check every passenger and bag entering the system, it is vital that we rely on our passengers to be our 'eyes and ears.' "
The agency encourages riders to report "unusual activity" through its BARTWatch app, by calling the agency's Police Department (510-464-7000) or by speaking directly to BART staff.
An autopsy is expected to be performed on the unidentified victim on Monday, according to the Alameda County Coroner's Bureau.
Clarification: As originally published, this post paraphrased a statement from BART police about the nature of the fatal shooting Jan. 9, 2016. We said: "The BART shooting, which authorities do not believe was random, took place on a San Francisco-bound train around 7:45 p.m." That statement, which implies the victim may have been targeted, was based on the following quote from BART police Lt. Aaron Ledford, who said, referring to investigators on the case, "They are not classifying it [the shooting] as random.”