The shooter at Santa Monica College yesterday who killed five people has been identified as John Zawahri:

The suspect in the shootings has been identified as John Zawahri, sources told CNN. Authorities say he killed his father, Samir “Sam” Zawahri, and brother, Chris Zawahri, in a Santa Monica house before carjacking a woman and firing at a public bus on Friday.

An image of him entering the library:

So far they are portraying him as angry over family issues.