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October 3, 2017 - Las Vegas, Nevada, United States: Scenes from inside the Mandalay Bay Resort and Casino on the Las Vegas Strip. Officers walk down the hallways of the gotel near where the shooter killed 58 people and injured 515 others. The gunman opened fire on Oct. 1 at night during a country music festival across the street from the Mandalay Bay Resort and Casino on the Las Vegas Strip. (Bild Exclusive / Polaris) ///
October 3, 2017 - Las Vegas, Nevada, United States: Scenes from inside the Mandalay Bay Resort and Casino on the Las Vegas Strip. Officers walk down the hallways of the gotel near where the shooter killed 58 people and injured 515 others. The gunman opened fire on Oct. 1 at night during a country music festival across the street from the Mandalay Bay Resort and Casino on the Las Vegas Strip. (Bild Exclusive / Polaris) ///

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    Police reveal new timeline of Vegas shooting

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Police reveal new timeline of Vegas shooting

Stephen Paddock shot a security guard who was investigating an open door alarm on the 32nd floor before opening fire on the concert crowd, Clark County Sheriff Joseph Lombardo said.

Police reveal new timeline of Vegas shooting

Stephen Paddock shot a security guard who was investigating an open door alarm on the 32nd floor before opening fire on the concert crowd, Clark County Sheriff Joseph Lombardo said.