Law enforcement has significantly changed the timeline of the mass shooting, saying the gunman shot a hotel security guard before he opened fire on concert-goers. "As soon as I started to go to a door to my left the rounds started coming down the hallway," Schuck said. The injured guard used his radio and possibly a hallway phone to also call hotel dispatchers for help. It was unclear if the hotel relayed the information to Las Vegas police, who did not respond to questions from The Associated Press about whether hotel security or anyone else in the hotel called 911 to report the gunfire. Undersheriff Kevin McMahill defended the hotel and said the encounter that night between Paddock and the security guard and maintenance man disrupted the gunman's plans.

Source: Bangkok Post October 11, 2017 18:22 UTC