this. one other thing we believe, according to police, is that john zawahri, he actually set the house on fire before he killed his brother and father. that's one thing they're telling us before he then carjacked a woman and then shot at a city bus. one other thing we are learning now too is the shooting happened a day before his 24th birthday. obviously, he was also killed in this shooting spree. we also have learned he attended a high school for people who are behind in credits as recently as 2006, and we also now know that as recently as 2010 that he was a student along with another family member at santa monica college as well, pamela. >> stephanie, police now know john zawahri amassed all of these weapons. do we know how? >> that is something that they definitely want to find out more about because he did have such a cache of weapons with him and ammunition. they're particularly interested in one rifle in particular. it's a .223 semiautomatic rifle.