Investigators have spent most of this week piecing together the story of Stephen Paddock, who on Sunday opened fire from his Las Vegas hotel suite, gunning down 58 people at a country music festival and injuring hundreds more.
Officials, who had previously credited Campos with stopping the assault by pulling his attention away from the concert, are allegedly still looking for an explanation as to why Paddock stopped his assault before ultimately killing himself.
"While some of it has helped create a better profile into the madness of this suspect, we do not still have a clear motive or reason why", he said.
Police have clarified that Campos had been responding to an alarm associated with an open door, unrelated to Paddock's two-room suite on the 32 floor.
Speaking on Monday, Lombardo said Campos was shot at 9:59 p.m., six minutes before the gunman began raining bullets on the country music festival.
Police tape blocks an entrance at the Mandalay Bay Resort & Casino on October 4, 2017 in Las Vegas, Nevada.
There is no indication anyone other than Paddock fired on the crowd, Sheriff Lombardo said, adding investigators are talking to family members and the girlfriend of the gunman.
The piece of paper was found by police officers who stormed Paddock's room after he launched his attack from the 32nd floor of the Mandalay Bay hotel Sunday night - killing 58 people and injuring almost 500.
Charles "Sid" Heal, a retired Los Angeles County sheriff's commander and tactical expert, said the new timeline "changes the whole perspective of the shooting".
McMahill said that this case is very different from previous terrorist attacks or mass murder incidents, where a motive was much easier to determine.
He declined to reveal what they had said, but stated: "Every piece of information we get is one more piece of the puzzle". The hotel leaders then contacted police to share their findings.
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Rouse said that they will create billboard ads around Las Vegas that will feature the words: "If you know something, say something" along with a phone number to report any leads.
Danley, through her attorney, said that she didn't know Paddock planned to carry out a mass shooting.
The search of Paddock's three-bedroom house on a cul-de-sac in a retirement community in Mesquite, Nevada, was for "re-documenting and rechecking", said local police Chief Troy Tanner, who accompanied Federal Bureau of Investigation agents as they served the search warrant.
"We have butlers and waiters and masseuses and the people in the beauty shop that know this woman and this man completely", Wynn said. If someone recalls even something slightly off about the shooter, they said, the detail could be helpful in the investigation.
After searches of Paddock's belongings by investigators, it was determined that he was in possession of a substance commonly used to build improvised explosive devices, however it was not found in the form of an explosive when it was found. Investigators also found aluminium nitrate and aluminium powder.
Danley said that Paddock "never said anything to me, or took any action I was aware of, that I ever understood to be a warning that something terrible like this was going to happen", according to the Los Angeles Times. They said that a "significant amount" of the explosive was in its "finished product", while they also found ammonium nitrate and aluminum powder, which, when combined make the finished product of Tannerite.
The brother of Strip mass murderer Stephen Paddock arrived in Las Vegas on Saturday night and was scheduled to sit for his second extensive interview with law enforcement investigators on Sunday, Eric Paddock told the Las Vegas Review-Journal. "I have good access to him", he said according to Oklahoma's News 4. By the time officers entered the room, Paddock was dead from a self-inflicted gunshot wound.
Bitsko said the level of preparation and work inside, including setting up wires for the cameras, suggested that it took Paddock "days to finish" getting it all ready.
Officers also found a handwritten note with calculations of distance and trajectory from his window to the crowd below, Newton said.
"Sometimes there isn't an understandable explanation for why someone commits a horrific crime", Mr Gomez said.