Just beyond the shattered room's entrance, an assault rifle can be seen resting on a bipod, which he used as a sniper's perch.
The family of Stephen Paddock, the man responsible for the shooting spree that killed 59 people and injured more than 515 others on Sunday night in Las Vegas, released a statement expressing their "shock" and "devastation" over the deaths.
Sheriff Joe Lombardo said he believed this was to alert Paddock to when police were coming. He went on to say, "He was a wealthy guy, playing video poker, who went cruising all the time and lived in a hotel room".
However, a senior USA homeland security official speaking on condition of anonymity told Reuters there was "no evidence" Paddock had "mental illness or brain damage".
Asked to confirm the legitimacy of photos of the hotel suite after the SWAT team entered that had been published by a media outlet, Lombardo said "What I can tell you, I'm very troubled by that".
"Body, body, body, then the last one - it's a body and he is shot in his stomach and his buddies are on top of him trying to revive him, and they are crying, they are panicking, people are screaming, they were behind a wall".
She was in the Philippines at the time of the attack and flew back to the United States late Tuesday.
It is the deadliest shooting in modern USA history, with the death toll surpassing the 49 killed at a nightclub in Orlando, Florida, in June 2016.
Visiting Puerto Rico on Tuesday, Trump said jokingly that the recovery from Hurricane Maria there was blowing the U.S. budget "a little out of whack".
In another scene, heavy gunfire is heard as officers work to determine the source of the attack. He had been staying at the hotel since Thursday, but staff said they saw nothing unusual about him or the room.
Two on-duty officers were wounded, one critically, police said. Paddock reportedly took his own life as officers closed in on his hotel room. "The first minute the police are aware of shots being fired is 10:08, and it stops at 10:19".