Using exclusive surveillance footage obtained from MGM Resorts, The New York Times pieced together the last days of Stephen Paddock, the Las Vegas gunman.

He plays video poker, laughs with hotel staff and hauls bag after bag of weapons into his suite.

The 2017 Las Vegas shooting occurred on the night of Sunday, October 1 when a gunman opened fire on a crowd of concertgoers at the Route 91 Harvest music festival on the Las Vegas Strip in Nevada, leaving 58 people dead and 851 injured.

Between 10:05 and 10:15 p.m. PDT, 64-year-old Stephen Paddock of Mesquite, Nevada, fired more than 1,100 rounds from his suite on the 32nd floor of the nearby Mandalay Bay hotel. About an hour after he fired his last shot into the crowd, he was found dead in his room from a self-inflicted gunshot wound. His motive remains unknown.

The incident is the deadliest mass shooting committed by an individual in the United States. It reignited the debate about gun laws in the U.S., with attention focused on bump fire stocks, which Paddock used to allow his semi-automatic rifles to fire at a rate similar to that of a fully automatic weapon.

Read more Breaking911