Sheriff Joseph Lombardo Las Vegas Metropolitan Police released the tentative timeline of what occurred the night that 59, including the gunman, people were killed.
10:05 p.m.: First shots fired by the suspect. This was seen on closed-circuit television from the concert venue.
10:12: First two officers arrive on the 31st floor and announce the gunfire is coming from directly above them.
10:15: The last shots are fire from the suspect, as per the body worn camera.
10:17: The first two officers arrive on the 32nd floor.
10:18: A hotel security officer tells the LVMPD officers that he was shot and gives them the exact location of the suspect’s room.
10:26-10:30: Eight additional officers arrived on the 32nd floor and begin to move down the hallway. They clear every room and look for injured people. The officers move forward because they no longer hear gunshots.
10:55: Eight officers arrive in the stairwell at the opposite end of the hallway nearest to the suspect’s room.
11:20: The first breach was set off and officers entered the room. They observed the suspect down on the ground and saw a second door that could not be accessed from their position.
11:27: The second breach was set off allowing officers to access the second room. Officers quickly realized there was no one else in the rooms and announced over the radio that the suspect was down.
Police waited to enter Paddock's room because gunfire had already stopped
Sheriff Lombardo said it was "phenomenal" officers were able to reach the 32nd floor within 12 minutes of the first shot being fired.
But by the time officers had arrived and confirmed the location of the suspect's room, the gunfire had stopped.
"Because no firing was occurring, they could not hear additional firing, they believed it was important to evacuate [hotel rooms] in case the suspect was barricaded," Sherriff Lombardo said.
He says in accordance with their training, officers retrieved a master keycard and began to systematically clear each hotel room.
He says while the first strike team did this, a second team — made up of two canine personnel, a SWAT officer and patrol officers — tried to get closer to Paddock's room.
"They attempted to secure the front doorway of the suspect's room but, as they entered into the hallway, they could see the room service cart, and readily apparent on the room service cart were cameras," he said.
That's why they pulled back and waited for the approach of a full SWAT team.
"Keep in mind this delay was not undue. It was purposeful and no shots were being heard by the suspect at this point," Sheriff Lombardo said.
Police believe the gunfire stopped when a security officer approached Paddock's hotel room
Sheriff Lombardo says his assumption was that Paddock was able observe the security officer outside his hotel room and was in fear he was "about to be breached".
"He was doing everything possible to figure out how he could escape at that point," he said.
The officer was then shot in the leg through the door.
"The bravery was amazing because he remained with our officers, providing them the key pass to access the door and actually continued to help them clear rooms until our officer demanded that he go seek medical attention," Sheriff Lombardo said.
However, he says it's likely the gunfire would have stopped around the same time even if the security officer hadn't approached Paddock's door, because police would have arrived there "maybe 60 seconds" afterwards.
It's unknown when exactly Paddock shot himself
Police say two possibilities are that it could have been when the hotel room door was breached with explosives or when a strike team was setting up in the hallway.
In all, the situation lasted 75 minutes from first shot until Paddock was found dead. (Timeline updated per Sheriff Joseph Lombardo on Wednesday.)
LVMPD Undersheriff Kevin McMahill also confirmed Tuesday initial reports regarding cameras being located at the scene inside the hotel. McMahill said two cameras were discovered in the hallway outside Paddock's room and another was found in the peephole of the room's door.
McMahill added that photos leaked to the media showing the scene inside Paddock's room - including weapons found inside - were from the scene