Las Vegas shooter Stephen Paddock was an "obviously premeditated" killer, setting up a video camera inside his hotel room 32 stories above a country music concert and surveillance equipment outside his room to tip him when police approached, Clark County Sheriff Joseph Lombardo said Tuesday.
"I'm not aware of any transmission, but there were cameras," Lombardo told reporters at a news conference in Las Vegas. "There were cameras.
"There was cameras located inside of the room and inside of the room, along with the firearms."
Undersheriff Kevin McMahill said at a later news conference Paddock had placed two cameras in the hall and another in the peephole of the door of his room.
He fired "off and on" for nine to 11 minutes, from the first call to police at 10:08 to 10:19 p.m. PT.
"We know that the suspect fired over a dozen or so volleys," he said.
McMahill said Paddock stopped firing because "I believe personally because the security guards approached to the room, obviously took his attention away — and he fired at the security guard."
Lombardo declined to say whether Paddock had recorded his rampage.
"That is being evaluated," he said. "The FBI took all digital and electronic evidence into custody — and we are evaluating."
Paddock shot himself as police closed in on his suite.
"This individual was premeditated," Lombardo later said. "Obviously premeditated.
"The fact that he had that in his room, it was preplanned — and I'm sure he evaluated everything he did in his actions, which is troublesome."
Paddock, 64, of Mesquite, Nevada, had one camera mounted in his hotel room, apparently to record himself, police told ABC News.
He killed 58 people and injured 527 others in a hail of bullets from his hotel room in the Mandalay Bay Resort and Casino.
All the victims have been preliminarily identified, Clark County Coroner John Fudenberg said. Paddock's death brings the number of fatalities to 59, he said.
Jill Snyder of the San Francisco office of the Bureau of Alcohol, Tobacco, and Firearms said a total of 47 guns were confiscated from Paddock's hotel room and two of his homes.
They included rifles, shotguns, and pistols — and were purchased legally in Nevada, Utah, California, and Texas.
Authorities also found 12 "bump-fire stocks" fitted for automation on weapons recovered from the hotel room, Snyder said.
Also, several pounds of ammonium nitrate, a fertilizer that can be turned into explosives such as those used in the 1995 Oklahoma bombing, were in his car, police said.
Paddock used a fully automatic weapon to fire on the 22,000 people at the Route 91 Harvest Festival, which was about 1,000 feet from his hotel room, authorities said.
In addition, federal authorities were investigating Paddock's wiring of $100,000 last week to the Philippines, the home country of his girlfriend.
Lombardo declined to be more specific, only saying Paddock's girlfriend, Marilou Danley, 62, was "a person of interest" in the case.
She was in the Philippines during the attack and Danley was expected to return to the U.S. Wednesday, he said.
"I'll assure you that the investigation with her is ongoing," Lombardo said. "We anticipate some information from her shortly."
Paddock and Danley started dating earlier this year, the Daily Mail reported.
"I pray that in these situations that a citizen, because we can't be at all places at all times, that a citizen sees something and says something, and we act on that," Lombardo told reporters.
"Quite often, what we experience in our line of work is a citizen thinks it's trivial and they say, 'No, I don't want to bother the police.'
"We ask you to bother the police."
Federal authorities also were investigating more than 200 financial transactions, some considered suspicious, Paddock made over the past three years, ABC News reported.
Most of the transactions involved large funds at casinos.
Casinos must report cash deposits or withdrawals of at least $10,000 to the Treasury Department, according to ABC News.
Authorities do not consider the transactions necessarily suspicious for Paddock, a retired accountant who reportedly made his wealth in real estate and gambled large sums of money, ABC reported.
A Utah gun shop owner who sold a shotgun to Paddock earlier this year said Tuesday there "wasn't anything" unusual about him when he bought his weapon.
Paddock had passed all the required background checks, said Chris Michel, owner of the Dixie GunWorx in St. George, Utah.
"I kept looking for red flags, but nothing was flagged for me or for anybody in my staff," Michel told CNN. "He just kept coming back and asking the right questions and looking at everything.
"It wasn't like there was just this one little thing or a look in his eyes," Michel added. "That didn't happen with him."
He said he noticed Paddock from news reports and realized he had come into his store earlier this year.
"One of the news articles I was looking through mentioned his name," Michel said. "And it triggered my memory.
"And I remembered him as a person. And that was horrific."
Michel told CNN "my heart ached for the victims.
"Not just for the people that were there as the victims, there are also friends and family that are beyond them that are going to be going through this.
"That was the first thing that hit me."
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