When Frank Ciccarelli hired David DePape, he was homeless and living under a tree in Berkeley’s Aquatic Park. But he was quiet, likeable and a steady worker building decks with Ciccarelli for six years, he recalled Monday. And politically liberal. Three years ago, Ciccarelli worked out a way for DePape to move into a converted garage in Richmond. It was that single car structure with a plywood floor that the FBI searched over the weekend. Ciccarelli says over the years, he watched DePape’s steady descent into extremism. It started when DePape would turn off NPR news in the morning on...