The authority's statement described three other incidents involving Cassidy, including a July 2019 suspension without pay for two days. The authority said the action was taken for insubordination after Cassidy’s “refusal to follow company policy in signing out a two-way radio.”
Last October, Cassidy refused to attend a mandatory CPR training, citing concerns about COVID-19.
Last November, he left work without permission after he had trouble clocking in for his shift and, later, “improperly used a VTA two-way radio for personal communication, rather than for operational matters.”
In the two weeks since the shooting, questions have swirled about what might have set off Cassidy’s lethal rampage and whether there were warning signs.
Authorities have described him as a “highly disgruntled” employee at the Valley Transportation Authority, where he had worked for more than 20 years.
His ex-wife said after the shooting that he had expressed hatred and resentment of his workplace for at least a decade. A co-worker described him as an outsider who didn’t mingle with others.
Neighbors and former lovers described Cassidy as moody, unfriendly and prone to angry outbursts at times, especially after drinking. But they expressed shock he would kill.
After the mass shooting, authorities found an arsenal and 25,000 rounds of ammunition at Cassidy’s home, which he tried to burn down before going on the deadly shooting spree. Santa Clara County sheriff’s officials said they found weaponry that included 12 guns, nearly two dozen cans of gasoline and a dozen or more suspected Molotov cocktails.