“Hey! … I’ve got somebody down in front of me,” a law enforcement officer says in the video, peering through a door pane into the next room shortly after hearing the final shots May 26 at a Santa Clara Valley Transportation Authority building in San Jose.The Santa Clara County Sheriff’s Office on Tuesday released the video, which shows deputies and police officers hunting for Samuel James Cassidy, who authorities say killed nine of his VTA co-workers in two buildings at