Video Surfaces of Paddock's 2011 Casino Accident

Could a failed lawsuit be another piece of the Stephen Paddock puzzle? Video has emerged of the Las Vegas gunman slipping and falling in the city's Cosmopolitan Hotel in 2011, the New York Daily News reports. Paddock, who shot through the windows of another casino to massacre 59 people Sunday night, claimed to have slipped in a puddle of liquid and sued the Cosmopolitan for $100,000 in compensation. According to court records, Paddock tore his hamstring in the fall and had $32,000 in medical bills. The case was dismissed after it went to arbitration in 2014. The arbitrator decided Paddock had failed to prove negligence. Investigators are still trying to determine Paddock's motive for the mass shooting.

Paddock was on his way to a high-roller part of the casino at the time of the fall, though Marty Kravitz, an attorney for the Cosmopolitan, tells NBC News that when Paddock showed up for a deposition, he was "unkempt," slovenly," and "bizarre." At the time of the fall, Paddock "was wearing crappy flip-flops with a beverage in a bag in his hand," the attorney says. "You wonder what a guy like this is doing at the Cosmo." Kravitz says, however, that there were no signs Paddock was unstable. "This is not a guy that I would have looked at and thought, 'He's going to commit a crime one day," he says. (Paddock's girlfriend has returned to the US from overseas.)