The last thing Dillon Angulo says he remembers is pulling over to see the stars. It was around 9:15 on April 25, 2019, in Key Largo, Florida. He and Naibel Benavides had been inseparable since their first date a few weeks earlier. Angulo, a bearded, stocky 27-year-old Cuban American, was studying general contracting at Florida International University. Benavides, an ebullient 22-year-old with long...