Scenes from Las Vegas shooting aftermath

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An investigator works in the room at the Mandalay Bay Resort and Casino where a gunman opened fire from on a music festival Tuesday, Oct. 3, 2017, in Las Vegas. The gunman killed dozens and injuring hundreds at the festival. (AP Photo/Marcio Jose Sanchez)

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Charlene Ragsdale pauses at a makeshift memorial in Las Vegas, Tuesday, Oct. 3, 2017. A gunman opened fire on an outdoor music concert on Sunday killing dozens and injuring hundreds. (AP Photo/John Locher)

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The Mandalay Bay resort and casino, right, overlooks an outdoor festival grounds across the street, left, Tuesday, Oct. 3, 2017, in Las Vegas. Authorities said Stephen Craig Paddock broke the windows on the casino and began firing with a cache of weapons, killing dozens and injuring hundreds at a music festival at the grounds. (AP Photo/John Locher)

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Debris litters a festival grounds across the street from the Mandalay Bay resort and casino Tuesday, Oct. 3, 2017, in Las Vegas. (AP Photo/Marcio Jose Sanchez)

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University of Nevada Las Vegas students Raymond Lloyd, right, and Karla Rodriguez take part in a vigil Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/Gregory Bull)

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People assist a wounded woman at the Tropicana during an active shooter situation on the Las Vegas Stirp in Las Vegas Sunday, Oct. 1, 2017. (Chase Stevens/Las Vegas Review-Journal via AP)

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A woman cries while hiding inside the Sands Corporation plane hangar after a mass shooting in which dozens were killed at the Route 91 Harvest Festival on Sunday, Oct. 1, 2017, in Las Vegas. (Al Powers/Invision/AP)

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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)

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Reed Broschart, center, hugs his girlfriend Aria James on the Las Vegas Strip in the aftermath of a mass shooting at a concert Monday, Oct. 2, 2017, in Las Vegas. The couple, both of Ventura, Calif., attended the concert. (AP Photo/Marcio Jose Sanchez)

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Flowers are placed near the scene of a mass shooting at a music festival near the Mandalay Bay resort and casino, top left, on the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/Marcio Jose Sanchez)

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A police officer takes cover behind a police vehicle during 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)

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Police run to cover at 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)

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A body is covered with a sheet after a mass shooting in which dozens were killed at a music festival on the Las Vegas Strip on Sunday, Oct. 1, 2017. (Steve Marcus/Las Vegas Sun via AP)

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Police officers advise people to 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)

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Concertgoers embrace as they wait early Monday, Oct. 2, 2017, inside the Sands Corporation plane hangar after a mass shooting in which dozens were killed at the Route 91 Harvest country festival early Sunday. (Al Powers/Invision/AP)

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Women make phone calls while taking shelter inside the Sands Corporation plane hangar after a mass shooting in which dozens were killed at Route 91 Harvest Festival on Sunday, Oct. 1, 2017, in Las Vegas. (Al Powers/Invision/AP)

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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 Photo/John Locher)

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Investigators load a body from the scene of a mass shooting at a music festival near the Mandalay Bay resort and casino on the Las Vegas Strip on Monday, Oct. 2, 2017, in Las Vegas. (AP Photo/Chris Carlson)

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A group of women wait for their ride outside the Thomas & Mack center, which served as a refuge, following a mass shooting at the Route 91 music festival along the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. (Yasmina Chavez/Las Vegas Sun via AP)

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A wounded woman is moved outside the Tropicana during an active shooter situation on the Las Vegas Strip in Las Vegas Sunday, Oct. 1, 2017. (Chase Stevens/Las Vegas Review-Journal via AP)

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A wounded person is walked in on a wheelbarrow as Las Vegas police respond during an active shooter situation on the Las Vegas Stirp in Las Vegas Sunday, Oct. 1, 2017. (Chase Stevens/Las Vegas Review-Journal via AP)

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Las Vegas police sweep through a convention center area during a lockdown Monday, Oct. 2, 2017, at the Tropicana Las Vegas following an active shooter situation on the Las Vegas Strip. (Chase Stevens/Las Vegas Review-Journal via AP)

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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)

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Ragne Domaas, of Norway, makes a heart symbol with her hands as her friend takes a photo Friday, Oct. 6, 2017, at Las Vegas’ famous sign near a makeshift memorial for victims of a mass shooting in Las Vegas. (AP Photo/John Locher)

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The funeral procession for Las Vegas police officer Charleston Hartfield passes the Mandalay Bay hotel on the Las Vegas Strip Friday, Oct. 20, 2017, in Las Vegas. (AP Photo/Isaac Brekken)

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People visit a makeshift memorial for victims of the mass shooting in Las Vegas, Monday, Oct. 16, 2017, in Las Vegas. (AP Photo/John Locher)

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Jenni Tillett writes a message at the Las Vegas Community Healing Garden, Monday, Oct. 16, 2017, in Las Vegas. The garden was built as a memorial for the victims of the recent mass shooting in Las Vegas. (AP Photo/John Locher)

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A woman reacts as she listens to Big & Rich perform during a benefit concert honoring first responders and those affected by the recent Las Vegas mass shooting, Thursday, Oct. 19, 2017, in Las Vegas. (AP Photo/John Locher)

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Workers install a #VegasStrong banner on the Mandalay Bay hotel and casino Monday, Oct. 16, 2017, in Las Vegas. Stephen Paddock opened fire from the hotel on an outdoor country music concert killing dozens and injuring hundreds. (AP Photo/John Locher)

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Alexandra Gurr cries as she lays flowers at a makeshift memorial for victims of a mass shooting Monday, Oct. 9, 2017, in Las Vegas. Stephen Paddock opened fire on an outdoor country music concert killing dozens and injuring hundreds. (AP Photo/John Locher)

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A pallbearer places gloves on the casket of Erick Silva during his funeral Thursday, Oct. 12, 2017, in Las Vegas. Silva was working as a security guard when he was killed during a mass shooting Oct. 1, in Las Vegas. (AP Photo/John Locher)

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Chantel Sosa cries at the graveside during a funeral for her brother Erick Silva, Thursday, Oct. 12, 2017, in Las Vegas. Silva was working as a security guard when he was killed during a mass shooting Oct. 1, in Las Vegas. (AP Photo/John Locher)

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Las Vegas shooting victim Kurt Fowler embraces his 10-year-old daughter Timori Fowler during a country music performance at Sunrise Hospital, Wednesday, Oct. 11, 2017, in Las Vegas. Kurt Fowler was shot in the mass shooting at a music festival in Las Vegas. (AP Photo/John Locher)

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People pause at a memorial set up for victims of a mass shooting in Las Vegas on Tuesday, Oct. 3, 2017. Authorities are trying to determine why Stephen Paddock, a 64-year-old high-stakes gambler and retired accountant, killed dozens of people at a country music festival Sunday in Las Vegas. (AP Photo/John Locher)

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People pray at a makeshift memorial for victims of a mass shooting Monday, Oct. 9, 2017, in Las Vegas. Stephen Paddock opened fire on an outdoor country music concert killing dozens and injuring hundreds. (AP Photo/John Locher)

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Melissa Gerber, left, Nancy Hardy, center, and Sandra Serralde, all of Las Vegas, embrace as they look on crosses in honor of those killed in the mass shooting Friday, Oct. 6, 2017, in Las Vegas. (AP Photo/Gregory Bull)

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Manuela Barela passes crosses set up to honor those killed during the mass shooting Friday, Oct. 6, 2017, in Las Vegas. (AP Photo/Gregory Bull)

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Crosses sit in honor of those killed during the mass shooting Friday, Oct. 6, 2017, in Las Vegas. (AP Photo/Gregory Bull)

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Las Vegas police Sgt. Ryan Fryman, right, wipes tears from his eyes during a vigil for Las Vegas police officer Charleston Hartfield, Thursday, Oct. 5, 2017, in Las Vegas. Hartfield was killed when Stephen Craig Paddock broke windows on the Mandalay Bay resort and casino and began firing with a cache of weapons at a country music festival Sunday. (AP Photo/John Locher)

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Flowers adorn chairs before a candlelight memorial for Las Vegas police officer Charleston Hartfield, Thursday, Oct. 5, 2017, in Las Vegas. Hartfield was killed when Stephen Craig Paddock broke windows on the Mandalay Bay resort and casino and began firing with a cache of weapons at a country music festival Sunday. (AP Photo/John Locher)

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Las Vegas resident Nancy Cooley signs a Vegas Strong banner honoring the victims of a mass shooting on Thursday, Oct. 5, 2017, in Las Vegas. (AP Photo/Gregory Bull)

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Greg Arnerich, of Mesa, Ariz., pauses at a memorial for the victims of a mass shooting in Las Vegas, Nev., on Wednesday, Oct. 4, 2017. (AP Photo/John Locher)

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Friends Danny Savage, left, and Susan Dozer pose for photos with Elvis impersonator Mark Edward Rumpler in front of the “Welcome to Las Vegas” sign Thursday, Oct. 5, 2017, in Las Vegas. Flowers and signs were left at the sign to remember the victims of a mass shooting. (AP Photo/Gregory Bull)

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Brandon Metzger, of Temecula, Calif., pauses at a memorial for the victims of a mass shooting in Las Vegas, Nev., on Wednesday, Oct. 4, 2017. (AP Photo/John Locher)

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A single rose is left at the door of the Mandalay Bay hotel and casino in Las Vegas, on Tuesday, Oct. 3, 2017. Authorities are trying to determine why Stephen Paddock, a 64-year-old high-stakes gambler and retired accountant, killed dozens of people at a country music festival Sunday in Las Vegas. (AP Photo/John Locher)

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Natalie Vanderstay answers questions from her hospital bed at University Medical Center on Tuesday, Oct. 3, 2017, in Las Vegas. Vanderstay was shot in the stomach and suffered a leg injury after a gunman opened fire on an outdoor music concert on Sunday. (AP Photo/Gregory Bull)

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Investigators work at a festival grounds across the street from the Mandalay Bay Resort and Casino on Tuesday, Oct. 3, 2017, in Las Vegas. Authorities said Stephen Craig Paddock broke windows on the casino and began firing with a cache of weapons, killing dozens and injuring hundreds at the music festival on Sunday. (AP Photo/Marcio Jose Sanchez)

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Kris Delarosby, right, and Colleen Anderson, left, hold Charleen Jochim, center, as they walk towards a hospital in search of information on a missing friend, Steven Berger of Minnesota, Tuesday, Oct. 3, 2017, in Las Vegas. The parents of Berger, who had been missing after the mass shooting in Las Vegas, say they have been notified on Tuesday afternoon that he was killed in the attack. (AP Photo/Gregory Bull)

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Christine Torres, right, and her daughter Sydney Torres hug at a memorial for the shooting victims in Las Vegas, Tuesday, Oct. 3, 2017. Authorities are trying to determine why Stephen Paddock, a 64-year-old high-stakes gambler and retired accountant, killed dozens of people at a country music festival Sunday in Las Vegas. (AP Photo/John Locher)

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Flowers and candles are left at a makeshift memorial site on Las Vegas Boulevard on Tuesday, Oct. 3, 2017, in Las Vegas. A gunman opened fire on an outdoor music concert on Sunday killing dozens and injuring hundreds. (AP Photo/Chris Carlson)