>> he liked just hurting things. ke reporter: burton says as a kid, cruz jumped in front of a moving car, and he liked to hurt animals. she said he was kicked out of at least two schools before being expelled from the marjory stoneman high school, which he terrorized on valentine's day. e' he wasn't allowed back in school because he was over the age of 18, and that's why he hated the school. .> reporter: cruz had no police record, and he seemed obsessed with firearms. >> he kind of fantasized about the other things, like columbine and hitler. he fantasized about, like, those types of stuff. >> reporter: officials say cruz left warning signs on social epdia, posting these photos on instagram, posing with knives and guns. >> he'd joke about being-- not boally being a klan member, but just... it's the stuff that he was into. ff reporter: today, local authorities say they are not aware of any ties cruz had to e litia groups. >> he had so much anger and pain inside of him. >> reporter: paul gold lived