
In the thousands of messages, photos, videos and songs posted online by Robert Crimo III, the 21-year-old suspected of opening fire on a Fourth of July parade in suburban Illinois, one conclusion is clear: Crimo was unusually interested in violence.
At least two of his music videos depicted some kind of shooting. On Discord, he shared a photo of Budd Dwyer, a politician who killed himself during a live press conference. And he apparently posted thousands of times to an online forum dedicated to sharing violent photos and videos of people dying.