FILE - In this Monday, Oct. 2, 2017 file photo, investigators load bodies from the scene of a mass shooting at a music festival near the Mandalay Bay resort and casino on the Las Vegas Strip on in Las Vegas. On Sunday, Oct. 1, 2017, Stephen Paddock opened fire on the Route 91 Harvest Festival killing dozens and wounding hundreds. Paddock spent hours in casinos. and was known for betting big on video poker and staring down fellow gamblers. There is no indication, though, that any particular grievance set him off. But details that have surfaced so far about the one-time IRS agent and son of a notorious bank robber, are clues, at least, to his mindset. (AP Photo/Chris Carlson, File)