Stephen Paddock, the Nevada man authorities identified as the gunman who killed 59 people at a country music festival on Sunday night in Las Vegas, "continued to fire at a progressive successive rate for approximately 9 minutes" after authorities received a 911 call, Clark County Sheriff Joseph Lombardo said at a news conference Tuesday afternoon.
The extremist organization has suffered a string of major setbacks in Iraq and Syria, where it has lost much of the territory it once claimed as part of a self-styled Islamic caliphate.
Most of the time, he would be with girlfriend Marilou Danley, 62, who is now a person of interest to police.
Posting on social media, Aldean expressed his grief and confusion over the tragedy, the worst mass shooting in modern U.S. history.
Pictures from the scene show the 64-year-old's body next to his weapons and spent ammunition.
Paddock shot himself as police closed in on his suite.
At least 58 people have died and 515 have been taken to hospital as the gunman sprayed bullets into the crowds from a Mandalay Bay Hotel balcony. Lollapalooza draws hundreds of thousands of music fans every year to Grant Park.
Flights resumed from Las Vegas to Hawaii Monday, bringing island residents back home after Sunday's killing-spree.
Officials met her when she arrived as Los Angles and whisked her out of a side door in a wheelchair.
While the existence of a note and its potential contents are yet to be confirmed by police, hotel staff have revealed the retired accountant kept a "Do Not Disturb" sign on his room for days before carrying out the massacre. Do not let our "leaders" make it easier for domestic terrorists to commit atrocities like this. "The best advice is to just get away as quickly as possible".
Photos published by the UK's Daily Mail showed a body purportedly inside Paddock's hotel room, along with semiautomatic rifles, including one with a scope and a barrel support mount. It was unclear whether those were wins or losses. He has since packed the ballpark for three more shows and performed twice at Gillette Stadium.
Describing the shooting as "an act of pure evil", United States President Donald Trump said he would visit Las Vegas on Wednesday and will meet with the first responders to the attack.
Aldean's connection to Boston began when former Red Sox pitcher Josh Beckett came out to the concert. "You could hear that the noise was coming from west of us, from Mandalay Bay".
The suspect fired from a room on the 32nd floor of a Las Vegas hotel into the crowd gathered below, said Las Vegas Sheriff Joe Lombardo (pictured above). This is not about the money. A stack of magazines and shell casings were seen near the guns.
Travellers were left in limbo as services into McCarran Airport were either cancelled or diverted to other airports in the US and Canada. Online records list addresses for Paddock in Nevada, Texas and Southern California. The shooting occurred on the final night, during a performance by Jason Aldean.