Las Vegas police busted a transgender gunman who allegedly planned a casino massacre using a huge cache of weapons. Allison Howlett, 36, who was born a man but lives as a woman, was arrested June 27 on charges of making terroristic threats, assault with a deadly weapon, auto theft, gun theft and other offenses. Shocking video of the arrest shows officers surrounding the vehicle dragging Howlett from the car, as he reached for a bottle of water ostensibly offered by the clever cops.