The Boston Globe, quoting anonymous sources, said Paddock may have scouted Fenway Park and other Boston venues. And Las Vegas police say Paddock rented hotel rooms near a concert featuring Chance the Rapper in Las Vegas about a week before the mass shooting, which occurred farther down the strip.



Investigators say Paddock's motive still eludes them as they piece together his movements and track down his purchases of dozens of weapons and thousands of rounds of ammunition.



"Anything that would indicate this individual's trigger point and would cause him to do such harm, we haven't understood it yet," Las Vegas Sheriff Joseph Lombardo told reporters. He said Paddock had been "living a secret life, much of which will never be fully understood."



The booking of the Blackstone rooms was first reported by TMZ and later confirmed to the Tribune by law enforcement sources. The Blackstone, in a statement, said a Stephen Paddock reserved rooms but no one by that name stayed there.



From those rooms, Paddock would have had a clear view of the entrance to Lollapalooza and a major exit across a bridge.