The new statement from MGM Resorts International contradicts recent comments by authorities who say Paddock shot Jesus Campos
through his hotel room door at 9:59 p.m., injuring him, before the gunman opened fire on the crowd six minutes later.
Initially, police said Campos had approached Paddock's room as the October 1 shooting was underway, diverting the gunman's attention. Paddock then shot Campos through the door and quit firing at concertgoers at the Route 91 Harvest Festival from his hotel room on the 32nd floor, the timeline said.
But MGM, which also owns the concert venue, said the time the security guard was reported shot is wrong.
"The 9:59 p.m. PDT time was derived from a Mandalay Bay report manually created after the fact without the benefit of information we now have. We are now confident that the time stated in this report is not accurate," MGM said.
"We know that shots were being fired at the festival lot at the same time as, or within 40 seconds after, the time Jesus Campos first reported that shots were fired over the radio," MGM said.
Police were with armed Mandalay Bay security officers in the building when Campos first reported shots were fired over the radio, the statement said. The officers and the armed security personnel immediately responded to the 32nd floor, MGM said.
Las Vegas Metro Police Department spokesperson Laura Meltzer said the department would not comment on the MGM statement.
The gunman's motive, the timeline of the shooting and why he stopped shooting are among the wealth of unanswered questions that persist after 11 days of investigation into the Las Vegas music festival massacre that left 58 people dead and injured nearly 500.
The lack of answers, especially about the timeline, seems all the more curious when, it would appear, many moments in the shooter's dayslong preparation -- and the actual assault -- were captured by hotel video surveillance or by cameras the gunman himself installed in his suite and hallway.
Clark County Sheriff Joseph Lombardo has asked the public for patience, saying authorities are trying to "draw the most accurate picture" of how the shooting unfolded.
Federal and local agencies continue collecting evidence, delving into the gunman's life and interviewing those close to him.
"There's more than 20,000 moving parts associated with this investigation and it takes time," the sheriff told CNN affiliate KLAS on Wednesday.
What happened in the 6 minutes after the hotel security guard was shot?
According to the police timeline, an open door to a room near Paddock's suite had set off an alarm, prompting Campos to respond to the floor. Once there, Campos heard a drilling sound from Paddock's room, and he was shot in the right upper thigh.