The previous weekend, Paddock had rented a high-rise condo in a building that overlooked the Life is handsome alternative music festival featuring Chance the Rapper, Muse, Lorde and Blink-182, said Lombardo, who offered no other details about what led Paddock there.
Las Vegas gunman Stephen Paddock may have been planning to strike two months earlier at the Lollapalooza festival in Chicago. He later booked a second room for August 3 through August 6, the same days as Lollapalooza in Grant Park. The hotel overlooks Grant Park where the Lollapalooza festival is held each year.
According to the Chicago Tribune, he booked rooms in the Blackstone Hotel that offered a clear view of the festival.
Investigators are probing the Las Vegas gunman's interest in other music festivals in the months before he killed 58 people and injured almost 500 at an outdoor country concert.
Paddock had also attempted to book rooms at the Ogden, a luxury condo tower that overlooked the Life is lovely open-air festival held in Las Vegas from September 22-24. In the end Paddock failed to turn up for the reservation.
When Paddock checked into the Mandalay Bay on September 28, he specifically requested an upper-floor room with a view of the Route 91 Harvest music festival, according to a person who has seen hotel records turned over to investigators and spoke on condition of anonymity.
The weekend before the massacre, he rented a room through Airbnb at the 21-story Ogden condominiums in downtown Las Vegas and stayed there during a music festival below that included Chance the Rapper, Lorde and Blink-182.
Hundreds of thousands attended the Lollapalooza festival at Chicago's Grant Park, including Malia Obama, the former president's daughter.
Boston police say the investigation into the Las Vegas gunman turned up evidence that referenced venues in Boston, including Fenway Park. They observed the suspect down on the ground and also saw a second door that could not be accessed from their position.
Country music star Jason Aldean was performing on stage at the Route 91 Harvest Music Festival when lone gunman Stephen Paddock, 64, opened fire on the 22,000 people gathered. Officers quickly realized there was no one else in the rooms and announced over the radio that the suspect was down.
Investigators say they have located the suspect's girlfriend and say that she is overseas and is no longer a person of interest.
"He never said anything to me or took any action that I was aware of that I understood in any way to be a warning that something terrible like this was going to happen", Marilou Danley, 62, said in a statement read by her lawyer outside Federal Bureau of Investigation headquarters in Los Angeles.
A federal official said authorities are looking into the possibility Paddock planned additional attacks, including a auto bombing.
Ms Danley, who officials have called a "person of interest", said that Paddock had surprised her with a plane ticket to see her family just over two weeks ago.
Tuesday night: Danley arrives back in the US from the Philippines.
Police said Paddock spent decades acquiring weapons while living a "secret life" and may have planned to escape the mass shooting alive.
"We are constantly revising and asking fundamental questions", said Mayor Rahm Emanuel, adding that the marathon would proceed as planned.