Zawahri, who attended Santa Monica High School, has had a history of mental illness. He has been described by a neighbor as angry.
Authorities continue to investigate what caused Zawahri to go on the rampage that began when he killed his father and older brother and set fire to the father's home, reports
CBS News
.
Zawahri then went outside and shot a woman who was driving by. He then carjacked another vehicle, ordering the female driver to drive as he rode in the passenger seat, shooting at others on the street, including a bus.
The suspect then shot and killed Carlos Navarro Franco, 68, and his daughter, Marcela, in a Ford Explorer. Marcela died Sunday.
Zahwahri then abandoned the car he was riding in, headed onto campus on foot, and began shooting randomly. One woman in her fifties was struck and killed outside of the library.
Campus officers and Santa Monica PD officers caught up with Zawahri inside the library, where he had opened fire as students studied for their final exams. Officers shot and killed Zawahri. Five people plus the gunman died as a result of Friday's shootings. Students returned to campus today.
Authorities have said there was no indication Zawahri had "subscribed to any extremist ideologies," reports
NBC News
.