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Stephen Paddock reportedly booked hotel rooms overlooking other major concerts in the weeks before he killed at least 58 people and injured nearly 500 who were attending a country music festival in Las Vegas.

The Las Vegas Review-Journal reported that Paddock rented several rooms at The Ogden hotel overlooking the Life Is Beautiful festival in downtown Las Vegas a week earlier.

The concert, which ran from September 22 to 24, featured Chance the Rapper, Lorde and Blink 182.

Clark County Sheriff Joe Lombardo said it's unclear if Paddock was engaged in “pre-surveillance” of the event.

TMZ reported that Paddock booked two rooms at Chicago’s Blackstone Hotel that overlooked the popular Lollapalooza festival in August. The hotel is located across the street from the venue, Grant Park, where 400,000 people, including Malia Obama, crammed in over four days to watch musical acts including Muse, The Killers and Arcade Fire.

According to TMZ's sources, Paddock never showed up.

Lombardo said Paddock spent decades stockpiling guns and living a “secret life” that investigators may never be able to fully understand.

He said that it was only logical to “make the assumption” that Paddock had “some help at some point” in pulling off Sunday's massacre, pointing to Paddock’s huge arsenal, explosive materials found in his car and his meticulous planning.

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