>> Good afternoon.>> A small change in the official timeline of the Las Vegas massacre raising big questions about the police response. At a press conference Monday night, the Las Vegas police chief saying the gunman, Steven Paddock, shot and injured a hotel security guard Jesus Campos before he opened fire on a country music concert.
>> What we have learned in Mister Campos was encountered by the suspect p prior to his shooting to the outside world.>>
eviously cops had said the security guard was shot after Paddock starting opening fire on the crowd while first responders were scrambling to identify the source of the shooting.
Police now saying Campos was checking out an alarm triggered by a door on the 32nd floor of the Mandalay Bay hotel on October 1st. The alarm was not associated with the door to the gunman's suite. At 9:59 PM Paddock shot through the door in his suite, into the hallway, injuring Campos.
Six minutes later, Paddock started raining bullets on the 22,000 people attending the festival across the street.>> Get down, get down, everybody down.>> He fired for 10 minutes. 58 people were killed, more than 500 injured. At 10:15, the shooting stopped. It's only at 11:20 pm, 80 minutes after the hotel's security guard is shot, that police use an explosive charge to enter Paddock's hotel room.
They found the gunman dead of a self-inflicted gunshot. Las Vegas police saying the security guard notified hotel security when he was shot. It's unclear if or when the hotel called the police. But if they did, officers may have had more time, six more minutes, to get to Paddock.
-year-old Steven Paddock amassed an arsenal of high powered rifles, many of them legally modified to increase the rate of fire.>> We believe he decided to take the lives he did, and he had a very purposeful, purposeful plan that he carried out.>> The large question looming over the mass murder, his motive, still unanswered more than a week later.