Stephen Paddock, 64, had planned to escape the 32nd floor of the Mandalay Bay hotel after firing on the Route 91 Harvest country music festival, Sheriff Joseph Lombardo revealed in a press conference Wednesday.
One gun owner NPR spoke with said he'd be open to policy changes in light of Sunday's massacre - but only with clear evidence that those changes would have prevented the attack.
"Our family, and all our extended family, the Danleys, have been getting death threats", his daughter said.
"She probably was even (more) shocked than us because she is more closer to him than us", one of her sisters said. "We had people in the hallways, people outside and more people coming in". He knocked out two windows to create sniper's perches he used to rain torrents of bullets on the crowd of 22,000 some 500 yards away, authorities said.
Bruce isn't the same brother who gave a number of interviews to the media about Stephen following the shooting. The man was searching for his daughter, a student at the elementary school.
Paddock's brother, Eric, has described himself as mystified by the attack.
Baker declined to comment on the report that the shooter had eyed Boston as a potential target because the investigation is ongoing.
Snyder said authorities would not have been notified of the rifle purchases but would have been informed if two or more guns were bought at one time.
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Trump, touring a hospital in Las Vegas, told reporters Paddock was "very demented". She said she was initially pleased when Paddock wired her money in the Philippines to buy a house for her family, but she later worried it was a way to break up with her. Both rooms were booked through August 6, the last day of the Lollapalooza, which drew around 400,000 to Grant Park.
Investigators say that the shooting rampage was meticulously planned and included specially modified weapons.
When we see America's reluctance to condemn Paddock as an "animal,"a "thug" or a "terrorist", as black criminals are so often labeled, the difference is stark". Claire McCaskill of Missouri, the ranking Democrat on the Homeland Security Committee.
"We already had a concert on City Hall Plaza", Evans said. If we're going to do anything sufficient or effective, it's got to be more related.
They are also looking at his gambling habits and checking records for any disputes he might have had with casinos or fellow patrons. Investigators have not determined whether or not this was an act of "pre-surveillance" of the festival.
The Australian girlfriend of Las Vegas gunman Stephen Paddock has arrived in the US for questioning.
Some 489 people were also injured when Paddock strafed an outdoor concert with gunfire on Sunday night from his 32nd-floor suite of the Mandalay Bay hotel on the Las Vegas Strip.
In explaining his theory, the sheriff mentioned Paddock's arsenal of 47 guns and a "plethora" of ammunition, plus his two Nevada residences.
Another seven guns were found at a property associated with Paddock in Reno.