Authorities came upon a startling and mysterious scene when they showed up at a luxury apartment in Los Angeles in April while investigating a call about a gas odor. The door was barricaded. A cache of loaded weapons, including an AK-47, sat next to a mosaic depicting the CIA seal. They found equipment for counterfeiting money. High-powered binoculars were trained on the U.S. Federal Reserve building next door. What followed was a six-week hunt for a suspect who had slipped out of the fire escape moments earlier and whose evasiveness drew comparisons to fictional agent Jason Bourne. Police would eventually...