Las Vegas gunman shot security guard before mass shooting

The Las Vegas gunman shot a hotel security guard before opening fire on a country music festival in Las Vegas earlier this month, Clark County Sheriff Joe Lombardo said Monday, contradicting earlier reports.

The latest update still indicates Paddock shot Campos when the security guard reported to the floor in response to a report of an open door.

Paddock, who had installed three cameras to monitor the approach to his suite, opened fire through the door, spraying 200 shots down the hall and wounding the guard, who alerted other security officials.

Lombardo also said that authorities "do not know" what caused Paddock to stop shooting.

Lombardo said that the revised timeline is based on new information that emerged over the course of the ongoing investigation. "Now, they are minute changes".

Police still have not determined Paddock's motive in the attack.

Police first encountered Campos when they got to the 32nd floor at 10:17 p.m. and met him in the corridor.

A few minutes later, Paddock began a 10-minute massacre that killed 58 people in the deadliest mass shooting in modern USA history. By Monday they had repeatedly searched his homes and interviewed his brother, girlfriend and others he's done business with.

Paddock killed 58 people and injured more than 500 before killing himself.

The sound echoed in his window, he said.

Conrade said he encountered police officers in the hallway when he tried to leave his room after the gunfire erupted. Seven minutes later, officers breached a second door in the room.

"He's like on retainer, I call it, I guess", Paddock said, according to CNN.

Lombardo provided additional details, including the fact that investigators have still not found any evidence suggesting another shooter was involved.

Paddock said that in 2006 he "averaged 14 hours a day, 365 days a year" on the video poker machines. The sheriff said he believed Paddock was drilling in order to create a place to put either a camera or a rifle.

In the course of the questioning, Paddock said he had no criminal records, no mental health issues and no history of addiction.

Paddock said he usually wandered around Las Vegas casinos wearing sweatpants and flip-flops, and never went to the pool because, as he said, "I do not do sun". The suspect, we know that he attempted to shoot at the fuel tanks, we know that he had some personal protection equipment in the room, we know that the auto that was found in the parking garage still, contained binary explosives.

"We believe he made a decision to take the lives he did and he had a very purposeful plan that he carried out".