What we know about Stephen Paddock, the man behind Las Vegas shooting

AOL.com UPDATE: While officials claim they have no evidence to suggest Paddock was connected to any militant group, ISIS has claimed responsibility for the attack and says Paddock had "converted to Islam a few months ago."

The Las Vegas police on Monday identified Stephen Craig Paddock as the man who opened fire from the 32nd floor of the Mandalay Bay Resort and Casino with what appeared to be an automatic rifle, killing more than 50 and injuring at least 200 in the deadliest mass shooting in modern US history.

The 64-year-old from Mesquite, Nevada, targeted concertgoers at the Route 91 Harvest country music festival at about 10 p.m. PDT on Sunday. The police say Paddock had been in his hotel room since Thursday.

Video and pictures from the festival captured the chaos and increasing panic as extended bursts of rifle fire rang out.

RELATED: The most devastating images from the Las Vegas shooting

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The most devastating images from the Las Vegas concert shooting
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The most devastating images from the Las Vegas concert shooting
LAS VEGAS, NV - OCTOBER 01: A man lays on top of a woman as others flee the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 2 people dead. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: People run from the Route 91 Harvest country music festival after apparent gun fire was hear on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 02: A cowboy hat lays in the street after shots were fired near a country music festival on October 1, 2017 in Las Vegas, Nevada. A gunman has opened fire on a music festival in Las Vegas, leaving at least 20 people dead and more than 100 injured. Police have confirmed that one suspect has been shot. The investigation is ongoing. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: People run for cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01:  A person lies on the ground covered with blood at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01:  A person lies on the ground at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: (People carry a peson at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: People take cover at the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
LAS VEGAS, NV - OCTOBER 01: A man in a wheelchair is taken away from the Route 91 Harvest country music festival after apparent gun fire was heard on October 1, 2017 in Las Vegas, Nevada. There are reports of an active shooter around the Mandalay Bay Resort and Casino. (Photo by David Becker/Getty Images)
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"Not an avid gun guy at all," Eric Paddock,  Stephen's brother told CBS News. "Where the hell did he get automatic weapons? He has no military background," said Paddock. 

"He's a guy who lived in a house in Mesquite and drove down and gambled in Las Vegas," said Paddock.

Following the attack, the Las Vegas police said Paddock was dead, possibly as a result of suicide. They discovered at least 10 rifles in his hotel room, said Joseph Lombardo, the sheriff of the Las Vegas Metropolitan Police Department.

A woman who attended the concert told Fox News that before the shooting a man and a woman — both of whom stood about 5 feet tall — had been escorted away.

"She had been messing with a lady in front of her and telling her she was going to die, that we were all going to die," the unidentified woman told Fox News.

"They escorted her out to make her stop messing around with all the other people, but none of us knew it was going to be serious," she added.

The police said they were searching for and found a 62-year-old woman named Marilou Danley, whom they've identified as Paddock's roommate and girlfriend.

The police described Danley as Asian, 4-foot-11, and weighing 111 pounds. The Las Vegas police identified Paddock as a white male.

Paddock owned two aircraft and held a pilot's license, according to the "Today" show. Paddock lived in the suburbs around Mesquite, Nevada, which sits near the border with Arizona about an hour and a half from where the shooting took place, the police said.

"We have no idea what his belief system was," Lombardo told reporters.

The Daily Mail quoted Paddock's brother Eric as saying he and his mother were "in shock" and "dumbfounded" after finding out about the shooting. According to the Daily Mail, Eric Paddock described his brother as a normal guy who must have "snapped."

The police are not investigating the attack as an act of terrorism at this time.

Families looking to locate missing loved ones, should call 1-866-535-5654.

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