It was morning, and the wide Las Vegas Strip was empty. Neon signs glittered quietly as Matthew Livelsberger cruised a silver Tesla Cybertruck down the palm tree-lined boulevard. It was around 8 a.m. on Jan. 1, 2025. In a convenience store parking lot, he backed into a spot and got out. A square-jawed 37-year-old, he wore jeans and a yellow T-shirt under a brown leather jacket. A security camera f...