By Nathan Rott October 05, 2017 Updated October 05, 2017 20171005_atc_las_vegas_shooter_stephen_paddock_was_a_high-level_gambler.mp3 Listen • 3:26 20171005_atc_las_vegas_shooter_stephen_paddock_was_a_high-level_gambler.mp3 Copyright 2017 NPR. To see more, visit http://www.npr.org/.