US agents failed to share questioning of rail yard shooter

A report by customs agents says a gunman who killed nine co-workers at a California rail yard in May harbored "dark thoughts about harming" two specific people after his return to California from a 2016 trip to the Philippines. 

Could the VTA shooting have been prevented?

Could the VTA rail yard mass shooting have been prevented? That's what Santa Clara County District Attorney Jeff Rosen wants to know. He's demanding access to a 2016 report, outlining an encounter between Customs and Border Protection and the shooter, Sam Cassidy. KTVU's Ann Rubin reports.