In this photo provided by the Mesquite, Nev., Police Department, police personnel stand outside the home of Stephen Paddock on Monday, Oct. 2, 2017, in Mesquite. (Mesquite Police via AP)
Crime scene tape surrounds the Mandalay Hotel in Las Vegas, Nevada on October 2, 2017. (MARK RALSTON/AFP/Getty Images)
Debris is strewn through the scene of a mass shooting at a music festival near the Mandalay Bay resort and casino on the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/John Locher)
Police vehicles block a street after sunrise Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/Ronda Churchill)
Drapes billow out of broken windows at the Mandalay Bay resort and casino Monday, Oct. 2, 2017. (John Locher/AP Photo)
President Donald Trump and first lady Melania Trump walk with with Vice President Mike Pence and his wife Karen on the South Lawn of the White House on Monday. (Pablo Martinez Monsivais/AP Photo)
President Donald Trump and first lady Melania Trump stand during a moment of silence to remember the victims of the mass shooting. (APPablo Martinez Monsivais/AP Photo)
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. (David Becker/Getty Images)
A woman sits on a curb at the scene of a shooting outside of a music festival along the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/John Locher) (AP)
President Donald Trump makes a statement about the mass shooting in Las Vegas, Monday, Oct. 2, 2017 at the White House in Washington. (AP)
Police responded to a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher)
Police responded to a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher)
Police responded to a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher)
Drapes billow out of broken windows at the Mandalay Bay resort and casino Monday, Oct. 2, 2017, on the Las Vegas Strip following a deadly shooting at a music festival in Las Vegas. (AP)
Police responded to a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher)
Police responded to a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher)
Police responded to a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher)
Police officers enter the Mandalay Bay resort and casino during a mass shooting on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher) (AP)
Police officers stand along the Las Vegas Strip outside the Mandalay Bay resort and casino (AP Photo/John Locher) (AP)
A police officer stands at the scene of a shooting along the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/John Locher) (AP)
Police officers stand along the Las Vegas Strip the Mandalay Bay resort and casino during a shooting near the casino, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher) (AP)
Police officers take cover near the scene of a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher) (AP)
A police officer runs along a sidewalk near a shooting near the Mandalay Bay resort and casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher) (AP)
Police officers rush into the Mandalay Bay resort and casino during a shooting near the casino on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher) (AP)
Police officers take cover behind a tree at the Luxor resort and casino during a shooting on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas. (AP Photo/John Locher) (AP)
Las Vegas Police stand at the scene of a shooting along the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/John Locher) (AP)