“NBC Bay Area’s Investigative Unit has learned that the gunman who shot and killed nine VTA co-workers before committing suicide Wednesday was under investigation for allegedly making racist remarks to coworkers and was scheduled to attend a disciplinary hearing on the day of the attack. According to law enforcement sources, Samuel Cassidy, 57, had been the subject of recent complaints including accusations that he was making inappropriate racial remarks to colleagues while on the job as a station maintenance worker” – NBC Bay Area.