(CNN) — Arizona investigators surveilling the man accused of shooting at the Democratic National Committee office in a suburb of Phoenix saw him posting political signs with bags of a white, powdery ...

Detectives watched in the middle of the night as a man began posting handmade political signs around his Ahwatukee Foothills neighborhood. Glued to the sides of some signs were small blades. Affixed ...

The authorities said they believed the suspect was “preparing to commit an act of mass casualty.” By Tim Balk An Arizona man has been arrested on terrorism charges in connection with three shootings ...