Two officials told AP that authorities found two bump stocks in Paddock's hotel room and were investigating whether they were used to modify weapons used in the massacre.
Las Vegas police have authenticated the photos and confirmed that at least 20 guns were found in the suite, including assault rifles and a handgun.
Trump will visit Las Vegas Wednesday, but the White House has rebuffed calls to reopen the fraught US debate on gun control in the latest atrocity's wake.
Another officer is heard saying, "North of the Mandalay Bay, it's coming out of a window!" A woman tripped right in front of me, a man shielded a woman with his body before I saw them both get up and run away, a man in a wheelchair was helped to an exit.
Paddock passed background checks for at least some of the firearms he purchased, and gun shop owners reportedly stated he appeared to be mentally stable. What more can be done?
How did the attack unfold?
Although Paddock killed himself as a SWAT team closed in, the sheriff said it appeared he had planned to survive and had an escape plan.
In the wake of America's deadliest mass shooting, Aldean has been subject to trolling by some on social media who've criticised him a for rushing off the stage without warning fans of impending danger. It's our turn to pay it forward. It was like, 'I'm here. "He was not aiming at any individual person". "I'd rather go through the inconvenience and be checked, and know that when I sit down to play, I'm safe". █ █ █ █ █ █ █ █ █ █ Lives cut short on night of celebration ► Rachael Parker, apolice records technician had been with the Manhattan Beach Police Department for 10 years.
Around 22,000 people were attending the country-music open-air concert, with Jason Aldean, who was performing when the shooting took place, describing the scene as "beyond horrific". Investigators have zeroed in on a weapon-buying binge Paddock went on in the year before the attack.
His room's position on the upper floors provided a clear shot at the crowds below, and officials are exploring the possibility he used tripods to fire more accurately, the New York Times reported.
"There's all kinds of things that surprise us in each one of these events", McCabe told CNBC. Could it be done?
"This is a horror story in every possible way", he said.
"Over the last 24 hrs I have gone through lots of emotions".
The retired Army lieutenant colonel and West Point graduate, who has a mechanical engineering degree and specialized in ballistics, has testified in many multiple-shooting cases. "The old 'see something, say something' works in all industries".
Hotel staff had also been into the room but didn't notice anything unusual.
Alphin is well acquainted with the trigonometry of terror.
Assistant Clark County Sheriff Todd Fasulo said officers found 23 firearms in the hotel room of and 19 firearms at Paddock's home in Mesquite, Nevada.