The Las Vegas gunman transferred $100,000 overseas in the days before the attack and planned the massacre so meticulously that he even set up cameras inside his high-rise hotel room and on a service cart outside his door, apparently to spot anyone coming for him, authorities said Tuesday.
Meanwhile, investigators are taking a harder look at the shooter's girlfriend and what she might have known about the attack, with the sheriff naming her a "person of interest" and saying the FBI is bringing her back to the US on Wednesday for questioning.