Samuel Cassidy, 57, opened fire at the at the Valley Transportation Authority yard in Santa Clara shortly before 7am, before he turned the gun on himself.
PICTURED: Nine victims of San Jose transit yard shooting, including father-of-two, 36, and a grandpa, 63, as footage shows killer setting off for work with bag full of guns after torching his own home
Samuel Cassidy opened fire shortly before 7am after calmly setting off from home carrying a duffel bag which police believe contained the gun used in the attack at the Valley Transportation Authority rail yard in San Jose
The 57-year-old killed nine colleagues and was found dead from an apparent self-inflicted gunshot wound
A motive has not yet been established but an ex-girlfriend claimed Cassidy had bipolar and was violent