As he tried to take cover, bullets began flying in the hallway, whizzing right past his head.
MGM Resorts International spokeswoman Debra DeShong said the company believes "what is now being expressed may not be accurate".
"In coordination with the FBI's behavioural analysis unit, a comprehensive picture is being drawn as to the suspect's mental state and now we do not believe there is one particular event in the suspect's life for us to key on", Lombardo said.
The police officers who responded to Stephen Paddock's room tell the CBS program "60 Minutes" that they used a pry bar to open the door after he screwed a piece of metal on it.
Gunshots can be heard in the background as Schuck reported the shooting on his radio, telling a dispatcher: "Call the police, someone's firing a gun up here". He was shot in the leg through the door of Paddock's room at 9:59 pm and six minutes later, at 10:05 pm, Paddock started firing into the crowd of concertgoers. "Someone's firing a rifle on the 32nd floor down the hallway".
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Lawyers who filed a lawsuit over the response to the Las Vegas massacre question why police and hotel and concert security officers didn't act more quickly to stop the gunman.
"There absolutely was an opportunity in that timeframe that some of this could've been mitigated", he said. Why has it been nearly 24 hours after the event and we don't know of any motives? Therefore, it is not appropriate for us to comment further at this time on what remains an open matter for law enforcement.
Undersheriff Kevin McMahill defended the hotel and said the encounter between Paddock and the security guard and maintenance man disrupted the gunman's plans.
There is no indication anyone other than Paddock fired on the crowd, Lombardo said, adding investigators are talking to family members and the girlfriend of the gunman.