Video Shows San Jose Gunman Sam Cassidy Walking Between VTA Buildings Before Shooting

A new surveillance video shows the suspected San Jose, California, gunman walking between Valley Transportation Authority (VTA) rail yard buildings before fatally shooting nine people.

In the video, which was released by the Santa Clara County Sheriff's Office, Sam Cassidy can be seen walking in the top-left corner, through a parking lot from a VTA building located on the west side of the facility to another building on the east side.

"Suspect (Samuel Cassidy) started the shooting incident at Valley Transportation Authority (VTA) Building "B" (west-side), and proceeded to walk towards VTA building "A" (east-side)," the Santa Clara County Sheriff's Office wrote in its description of the video.

The sheriff's office also noted in its description that the timestamp shown in the video "is not accurate to current time of incident."

Newsweek reached out to the sheriff's office for clarification on exactly when the video was taken but did not receive a response in time for publication.

On Thursday, the Santa Clara County Medical Examiner's office identified 57-year-old Cassidy as the suspected shooter at the VTA light rail yard facility.

According to a press release from the sheriff's office, the mass shooting occurred on Wednesday at around 6:34 a.m. At that time, officers first received reports of an active shooter at the VTA facility located at 101 West Younger Avenue.

California Shooting
A bomb squad member works with a robot on May 26 near the scene of a mass shooting at the Valley Transportation Authority rail yard in San Jose, California. Philip Pacheco/Getty

Santa Clara County Sheriff Laurie Smith told the Associated Press on Thursday that Cassidy fired 39 shots, fatally striking nine individuals. Eight victims were initially pronounced deceased on the scene, while a ninth was pronounced dead at the Santa Clara Valley Medical Center after being transported there in critical condition. Cassidy died from a self-inflicted gunshot wound when officers confronted him.

The sheriff's office said in an updated press release on Thursday that detectives discovered "three semi-automatic handguns (9mm) at the scene." The guns included "32 individual high capacity handgun magazines loaded with additional ammunition."

Police have yet to discover a motive for the shooting. They said an investigation is ongoing and includes conducting interviews as well as reviewing surveillance videos and cellphone records.

"Based on recent developments in the investigation we can say that the suspect has been a highly disgruntled VTA employee for many years, which may have contributed to why he targeted VTA employees," the sheriff's office said in the press release. "The investigation into motive remains ongoing and no additional information is available at this time."