<P> Paddock may have considered attacking other events . He had researched large - scale venues in cities such as Boston since at least May 2017, and had reserved a room overlooking the August 2017 Lollapalooza festival in Chicago, but did not use it . According to his girlfriend, she and Paddock were at the Mandalay Bay during an earlier stay a month before the attack when he repeatedly cased out Las Vegas Village from different windows in their room . From September 17, Paddock stayed at The Ogden in Downtown Las Vegas, which overlooked the open - air Life Is Beautiful festival that ran from September 22 to September 24 . His internet search terms from mid-September included "swat weapons", "ballistics chart 308", "SWAT Las Vegas", and "do police use explosives". </P> <P> Paddock arrived at the Mandalay Bay on September 25, 2017 . He was booked into Room 32 - 135, a complimentary room on the 32nd floor . Four days later, he also checked into the directly - connected Room 32 - 134 . Both suites overlook the site of the concert at Las Vegas Village . Between September 25 and October 1--the day of the shooting--he stockpiled an arsenal of weapons, associated equipment and ammunition that included fourteen AR - 15 rifles (twelve of which had bump stocks and 100 - round magazines), eight AR - 10 rifles, a bolt - action rifle, and a revolver . Often with the help of hotel bellhops, he brought five suitcases to his room on September 25, seven on the 26th, two on the 28th, six on the 30th, and two on October 1 . Cell phone records also show that he also made multiple visits to his home in Mesquite . On September 30, he placed "Do not disturb" signs on the doors of both rooms . Paddock spent much of his time at the Mandalay Bay before the shooting gambling, often at night . He interacted with Mandalay Bay employees more than ten times during his stay, including twice on the day of the shooting; an MGM Resorts International spokesperson said they were all "normal in nature". </P> <P> The mass shooting occurred between 10: 05 and 10: 15 p.m. PDT on October 1, 2017, which was the third and final night of the festival . When the shooting began, country music singer Jason Aldean was giving the closing performance . </P> <P> Shortly before 10: 00 p.m., hotel security guard Jesus Campos was sent to the 32nd floor to investigate an open - door alert . He attempted to open a door that provided immediate access to the floor, but found that it would not open . After Campos entered the floor, he discovered an L - shaped bracket screwed into the door and door frame, which was responsible for barring the door from opening . After reporting the discovery to his dispatch center, he heard the sound of rapid drilling coming from Room 32 - 135 and went to investigate the matter . At approximately 10: 05, he was hit in the right thigh by one of about 35 bullets that Paddock fired through the door of his suite . After Campos was hit, he took cover in the alcove between Rooms 32 - 122 and 32 - 124 and immediately informed the hotel by radio and cellphone that he had been shot, though he believed he had been shot with a BB or pellet gun . At the same time, maintenance worker Stephen Schuck was on the same floor to fix the door that Campos had reported as being barricaded . Campos, who was already injured, encountered Schuck and told him to take cover . Schuck contacted hotel dispatchers over his radio, informed them of the ongoing shooting, and told them to call the police . Neither Las Vegas Metropolitan Police Department nor MGM Resorts International, the Mandalay Bay's owner, have confirmed when information about the initial shooting was relayed to the police . </P>

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