LAS VEGAS _ The gunman who attacked a Las Vegas country music festival installed cameras outside his hotel room, including at least one in a room service cart, to watch for the approach of police officers as he carried out his rampage, officials said Tuesday.
Officials still haven't offered a motive for why Stephen Paddock, 64, of Mesquite, Nev., opened fire on a concert being held across the street from the Mandalay Bay Resort and Casino on Sunday night, killing 59 and injuring more than 500.
Officials have identified all but three of the dead.
But additional information obtained by investigators revealed the extent to which Paddock, who owned dozens of guns, apparently "pre-planned extensively" for the attack, said Clark County Sheriff Joe Lombardo.
One Mandalay Bay security guard, who had become separated from police, was shot in the leg through the door of Paddock's room when he approached, Lombardo said. The security guard escaped and police surrounded the room, eventually breaking inside, where they discovered that Paddock had killed himself.
A photograph obtained by the German newspaper Bild showed part of the interior of Paddock's suite. What appears to be an AR-style rifle rests on the floor. It is fitted with a scope to aid long-distance shooting and a bipod for steadying the shooter's aim.
Lombardo said that Paddock's girlfriend, Marilou Danley, was still out of the country and in the Philippines, but that authorities were hoping to talk to her soon.
A federal law enforcement official said investigators discovered significant recent bank transfers by Paddock to a Philippines account of his girlfriend.
Paddock had a history of berating his girlfriend publicly, according to baristas at the Starbucks inside the Virgin River Casino in Mesquite, where the couple were frequent customers.
"It happened a lot," Esperanza Mendoza, supervisor of the Starbucks, said Tuesday.
Paddock's abuse would come when Danley asked to use his casino card to make the purchase, Mendoza said. The card enables gamblers to use credits earned on electronic gambling machines to pay for souvenirs or food at the casino.
"He would glare down at her and say _ with a mean attitude _ 'You don't need my casino card for this. I'm paying for your drink, just like I'm paying for you.' Then she would softly say, 'OK' and step back behind him. He was so rude to her in front of us."
In addition to raiding the couple's home in Mesquite, police also raided their home in a retirement community nestled in the rolling foothills outside of Reno, where investigators recovered five handguns, two shotguns and ammunition.
Neighbor Susan Page, a retired financial analyst, barely saw the couple. She said Paddock left the house for good sometime near the middle of August. She last saw Danley a week later, she said. Danley was packing up her car, piling things on the roof.
The mass shooting has launched another debate over access to guns in the United States, with much scrutiny falling on the gunman's use of a "bump stock" style device that allows the shooter to rapidly fire off rounds without actually converting it to a fully automatic weapon.
President Donald Trump, on his way to visit hurricane victims in Puerto Rico before a planned visit to Las Vegas on Wednesday, told reporters in Washington on Tuesday that "we'll be talking about gun laws as time goes by," not stating whether he would be for or against certain regulations now under debate.
Paddock had at least 23 weapons in his hotel room, mostly rifles that were originally designed for military use but which have become popular among civilians in recent decades. Paddock had been able to squeeze off a rapid stream of what sounded like fully automatic fire at the defenseless concert-goers at the outdoor Route 91 Harvest festival.
Automatic weapons _ which unleash multiple bullets with a single pull of the trigger _ are more heavily regulated under U.S. law than semiautomatic guns, which fire one bullet per trigger pull. But they are not banned outright. Paddock had apparently bought his guns legally, passing background checks.
The shooting brought outrage by one of the survivors of the attack, country musician Caleb Keeter, a guitarist for the Josh Abbott Band.
"I've been a proponent of the 2nd Amendment my entire life. Until the events of last night," Keeter wrote in a message he posted to Twitter on Monday.
"Writing my parents and the love of my life a goodbye last night and a living will because I felt like I wasn't going to live through the night was enough for me to realize that this is completely and totally out of hand," Keeter wrote. "These rounds were powerful enough that my crew guys just standing in close proximity of victim shot by this ... coward received shrapnel wounds. We need gun control RIGHT. NOW."
The attack also brought a tearful rebuke by late-night TV host Jimmy Kimmel, whose comedy shows have become increasingly political over the last month as his newborn son's heart condition prompted him to take a stand on health care legislation, just as an attack on his hometown of Las Vegas prompted him to call for gun control Monday night.
He showed photographs of the dozens of Republican senators who have voted against tighter gun control laws.
Republican leaders "sent their thoughts and their prayers today, which is good," Kimmel said. "They should be praying. They should be praying for God to forgive them for letting the gun lobby run this country."
National Rifle Association spokeswoman Dana Loesch, on her radio show, said that new calls to restrict the size of ammunition magazines or "bump fire" accessories would be "unenforceable" in practice, given that those accessories can be created with private tools.
"Even if you outlaw the accessory to aid someone doing it, you can use something in your garage," Loesch said. "What would a law restricting something that's virtually unenforceable accomplish? ... If he is going to murder a ton of people, do you think he's going to be deterred by a law on simulating full auto?"
Twelve off-duty firefighters were among those shot and wounded at the concert, and two of them were struck while doing CPR, firefighter union officials Tuesday.
They "were shot as they went to work helping other members in the audience," said Ray Rahne, a regional vice president of the International Association of Fire Fighters, at a televised news conference in Las Vegas.
"People they didn't even know, they were working on, and they were shot by the gunman," said Rahne, who had been a fire battalion chief in Littleton, Colo., during the mass shooting at Columbine High School in 1999. "This is a true feat of heroism on their part."
Dozens of off-duty police, firefighters and emergency medical technicians, were in the audience enjoying the show, and many of them helped others when the chaos began.
"They began evacuating civilians, they began treating those people that were injured and shot, some of them their own family members," said Angelo Aragon, president of the Professional Fire Fighters of Nevada. After evacuating some people, they ran back into the danger, Aragon said.
One of those wounded while performing CPR was a San Bernardino County, Calif., fireman, who was shown in a hospital bed, alert, with his right arm in a bandage and resting on a pillow in a tweet by one union official.
