After setting fire to the house, John Zawahri, armed with an AR-15-type semiautomatic rifle, which he put together himself from legally purchased components, some of which required machining with a mill. He stopped a woman driving a Mazda hatchback, holding her at gunpoint. A passing female driver tried to intervene and was shot and wounded by the gunman. He then ordered the driver of the first car, a 41-year-old woman, to drive him to the Santa Monica College campus. Along the way, Zawahri shot at city bus 4057 of Big Blue Bus, which was carrying approximately two dozen passengers; three of them suffered injuries. A police cruiser was also fired upon. Upon arriving on the college campus, John Zawahri shot into a Ford Explorer, killing the 68-year-old male driver and fatally wounding the passenger. He then continued on foot toward the college library, fatally shooting another woman immediately outside. Entering the library, Zawahri opened fire on students inside, then focused his gunfire on a group of library employees barricaded in a storage room. Witnesses stated they heard gunshots and screams, but were able to hide or escape unharmed. While on the campus, he fired at least 70 rounds and dropped a duffel bag loaded with ammunition magazines, boxes of bullets, and a .44 revolver. When police arrived at the college, they exchanged gunfire with John Zawahri. He was fatally shot by officers inside the library and then brought outside where he died. Authorities investigated up to nine crime scenes believed to be tied to the thirteen-minute-long shooting spree. Though Zawahri had been killed, officers actively searched the college campus for additional shooters and victims for over eight hours.