The Las Vegas gunman asked to be upgraded to a hotel room with a "better view" before he unleashed terror on a country music festival crowd, killing 59.
In early August, Paddock booked a room at Chicago's 21-story Blackstone Hotel that overlooked the park where the Lollapalooza music festival was being held, a law enforcement official said Thursday. That festival attracts hundreds of thousands of people to the downtown Chicago park, which is framed by tall buildings.
A source told the paper bullet holes were found in two white tanks but did not penetrate - saving music-goers from a potentially massive explosion which may have taken the lives of many more. They then breached the door to the second room in the suite, but no one was there, he said.
Stephen Paddock is the man responsible for America's worst ever mass shooting.
The initial TMZ story said Paddock booked one room for August 1, two days before Lollapalooza kicked off and then booked a second room, both with checkout dates of August 6, when the festival ended.
The Life is handsome festival was discussed briefly during a press conference on Tuesday by Sheriff Lombardo. She said she had no inkling of his murderous plans.
Investigators have zeroed in on a weapon-buying binge Paddock went on in the year before the attack. He says the department will increase the number of undercover officers working Monday night when the Bears play at Soldier Field and next week when the Cubs return to Wrigley Field for the National League playoffs. "We can't comment on an ongoing investigation", she said.
"When we did see he was gambling, we did not see another individual appearing there". Authorities continue to investigate. "They train all year", Emanuel said.
Ms Danley said Paddock had bought her an airline ticket to visit her family and wired her money to purchase property there, leading her to worry he might be planning to break up with her.
Discerning Paddock's motive has proven especially baffling as he had no criminal record, no known history of mental illness and no outward signs of social disaffection, political discontent or extremist ideology, police said.