Some of the security cameras aboard San Francisco Bay Area commuter trains are fake and do not record the activity of passengers.
The Oakland Tribune reported Friday that BART Director Gail Murray says some of the cameras are decoys while some are live.
BART police have been investigating the shooting since Saturday night, when a man shot a passenger to death as a San Francisco-bound train rolled into the West Oakland station.
The transit agency has many surveillance cameras on the station platforms and at fare boxes. One of those cameras caught images that police have distributed of the gunman leaving the station. No arrests have been made.