Cops Seen Swarming Hotel After Vegas Massacre in Heart-Stopping Footage

Footage has been released from inside the hotel where Stephen Paddock killed 58 people and injured hundreds more in the deadliest mass shooting in modern U.S. history. It reveals the chaos and confusion Las Vegas police encountered as they entered the Mandalay Bay casino and then Paddock's heavily fortified hotel room.'s Leigh Scheps ( has more.