Ethan Hendrix, 21, was an introverted computer nerd who loved reading, video games, and cats. He lived alone with his cat, kept to himself, and rarely strayed from routine. With short brown hair, dark eyes, and glasses, he blended easily into the background. Years ago, he’d had a best friend who moved away—someone he quietly missed, someone he once had a crush on. It had been seven years, but some feelings never fully disappeared.