June 7th, 2013, Santa Monica College
Twenty-three-year-old John Zawahri built his own .223 caliber assault rifle, and then used it to kill his brother and father after a dispute at his Santa Monica, California, home. Zawahri set the house on fire and then carjacked a woman, forcing her to drive him to the Santa Monica College library. He shot and wounded a woman who tried to intervene, then opened rounds on a city bus and police cruiser, injuring a few more.
At Santa Monica College, Zawahri fatally wounded three people in the parking lot before police shot and killed him in the library. Zawahri left a note expressing remorse for the killing of his relatives, but offering no explanation for his actions at the College.