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.
Unnamed law enforcement officials tell USA Today the reservation was scheduled to begin August 1, two days before the start of the festival, with a checkout date on August 6.
However, Paddock never checked into the hotel and there is now no evidence that supports he was in Chicago around those dates.
The hotel is located across the street from the music festival's venue that can accommodate tens of thousands of people.
The hotel is cooperating with the authorities on this matter, said Carragher.
Bookings have been uncovered in Ogden a luxury condo tower that overlooks the Life is handsome festival in Las Vegas from September 22 to 24.More news: Kim Jong-un not mad but a 'rational actor', Central Intelligence Agency says
Additional reports indicated Paddock may have also scoped out events as far away as Boston, although no specific hotels or events have been indicated as his possible targets.
Investigators looking into Paddock's background and his movements before his killing spree erupted in Las Vegas say he must have had some help along the way given his huge arsenal and precise plans, but they have no idea who that might be.
The dates the reservations were made, July 23 and 27, show that Paddock spent quite some time planning his attacks but it is unknown why he chose not to go through with this particular attack.
The details came to light as investigators struggled to figure out why the high-stakes gambler opened fire on a crowd of 22,000 Sunday night from the 32nd floor of the Mandalay Bay hotel casino in Las Vegas.
The venue attracts almost 100,000 people per day and has musical acts with huge names such as Chance the Rapper, Blink 182 and The Killers.
The investigation into the shootings is ongoing. "They're going to be around the runners", Riccio said.
Clark County Undersheriff Kevin McMahill said the shooting spanned between nine and 11 minutes. Lombardo said at a news conference.