In this Sept. 28, 2017, security camera image released by MGM Resorts, Stephen Paddock is followed by a bellman in a hallway, at the Mandalay Bay hotel in Las Vegas. The newly released video shows the man who killed 58 people on the Las Vegas Strip moving around a casino before the attack, gambling, bringing suitcases into his room at Mandalay Bay but doing nothing that would obviously raise suspicions. (MGM Resorts via AP)