Jon Dimaya of Las Vegas, a rapid response team nurse at Sunrise Hospital, holds a sign on Las Vegas Boulevard, on Oct. 2, 2017 in Las Vegas, Nevada.

Denise Truscello/Getty Images

Two women embrace outside of a family assistance center on Oct. 2, 2017, in Las Vegas. The makeshift center was set up to help families and others reconnect after the mass shooting on the Las Vegas Strip.

© John Locher/AP

Hundreds of people queue to donate blood following the mass shooting at the Route 91 music festival in Las Vegas, Nevada, on Oct. 2, 2017.

© Mike Blake/Reuters

Eric Paddock, left, brother of Las Vegas gunman Stephen Paddock, speaks to members of the media outside his home, on Oct. 2, 2017, in Orlando, Fla. Paddock told the Orlando Sentinel: "We are completely dumbfounded. We can't understand what happened."

© John Raoux/AP

Two women console each other outside of a family assistance center, on Oct. 2, 2017, in Las Vegas.

© John Locher/AP

Donald Trump, First Lady Melania Trump, US Vice President Mike Pence and his wife, Karen, participate in a moment of silence on the South Lawn of the White House in Washington, on Oct. 2, for the victims of the shooting yesterday in LA.

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United Blood Services phlebotomist Sha-Na Hill takes blood from Richard Williams of Nevada at a special United Blood Services drive at a University Medical Center facility to help victims of a mass shooting on Oct. 2

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People drive a cart through the scene of a mass shooting at a music festival on the Las Vegas Strip, on Oct. 2.

© John Locher/AP Photo

Drapes billow out of broken windows at the Mandalay Bay on Monday, Oct. 2, 2017, on the Las Vegas Strip following a deadly shooting at a music festival in Las Vegas.

© John Locher/AP Photo

Police vehicles block a street after sunrise on Monday, Oct. 2, 2017, in Las Vegas. A mass shooting occurred late night Sunday at a music festival on the Las Vegas Strip.

© Ronda Churchill/AP Photo

The couple, who were attending the music festival Sunday night where a mass shooting occurred, found refuge in a nearby apartment and casino.

© Ronda Churchill/AP Photo

People head to buses as they leave the Thomas & Mack Center the day after a mass shooting at a country music festival in Las Vegas, Nevada. People who could not go to hotel-casinos that were closed after the shooting temporarily stayed at the center.

© Ethan Miller/Getty Images

President Donald Trump makes a statement on the mass shooting in Las Vegas from the Diplomatic Room at the White House in Washington on Oct. 2, 2017.

© Joshua Roberts/Reuters

People walk near the Las Vegas Strip shortly after sunrise Monday, Oct. 2, 2017, in Las Vegas. A deadly shooting occurred Sunday at a music festival on the Las Vegas Strip.

© Ronda Churchill/AP Photo

A woman speaks on the phone while walking along the Las Vegas Strip near the Mandalay Bay on Monday, Oct. 2, 2017, in Las Vegas.

© Ronda Churchill/AP Photo

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 Oct. 1 in Las Vegas.

© Al Powers/Invision/AP Photo

A picture taken on Oct. 2 shows the Tel Aviv city hall lit up in the colors of the American flag to honor the victims of an attack in Las Vegas, at the Rabin Square in Tel Aviv.

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Police and rescue personnel gather at the intersection of Las Vegas Boulevard and Tropicana Ave. after a mass shooting at a country music festival nearby in Las Vegas, Nevada.

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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.

© John Locher/AP Photo

A pair of cowboy boots is shown in the street outside the concert venue after a mass shooting at a music festival on the Las Vegas Strip in Las Vegas, Nevada on Oct. 1, 2017.

© Steve Marcus/Las Vegas Sun/Reuters

Police run to cover at the scene of a shooting near the Mandalay Bay on the Las Vegas Strip, Sunday, Oct. 1, 2017, in Las Vegas.

© John Locher/AP Photo

Las Vegas police stand guard along the streets outside the Route 91 Harvest country music festival grounds after a active shooter was reported on Oct. 1, 2017 in Las Vegas, Nevada.

© David Becker/Getty Images

People run from the Route 91 Harvest country music festival after apparent gunfire was heard on Oct. 1, 2017 in Las Vegas, Nevada.

© David Becker/Getty Images

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.

© John Locher/AP Photo

People run for cover at the Route 91 Harvest country music festival after apparent gun fire was heard on Oct. 1, 2017 in Las Vegas, Nevada.

© David Becker/Getty Images

People dive for cover at Route 91 Harvest country music festival after apparent gunfire was heard on Oct. 1, 2017 in Las Vegas, Nevada.

© David Becker/Getty Images

A man in a wheelchair is taken away from the Route 91 Harvest country music festival

© David Becker/Getty Images

People run from the Route 91 Harvest country music festival.

© David Becker/Getty Images

A cowboy hat lays in the street after shots were fired near a country music festival on Oct. 1, 2017 in Las Vegas, Nevada.

© David Becker/Getty Images

A crowd of people at the Route 91 Harvest country music festival after gunfire was heard on Oct. 1, 2017 in Las Vegas, Nevada.

© David Becker/Getty Images

This undated photo provided by Eric Paddock shows his brother, Las Vegas gunman Stephen Paddock. On Sunday, Oct. 1, 2017, Stephen Paddock opened fire on the Route 91 Harvest Festival killing dozens and wounding hundreds.

© Courtesy of Eric Paddock/AP Photo