Inside the main living area of the suite, police found 18 rifles and a handgun. There were five more guns in another room. Several hundred rounds of ammunition were also found in the hotel room. Search warrants showed there were 20 2-pound containers of exploding targets and 10 1-pound containers of exploding targets in his parked vehicle at the Mandalay Bay. Most of his arsenal had been obtained in the year leading up to the shooting.

Source: Los Angeles Times May 02, 2018 20:48 UTC