In addition to the 58 people killed, almost 500 were injured, some by gunfire, some trampled or otherwise hurt while running for cover.
Almost a week after the deadliest mass shooting in modern USA history, federal agents on Saturday started hauling away the piles of backpacks, purses, baby strollers and lawn chairs left behind when frantic concert-goers scrambled to escape raining bullets from a gunman who was shooting from his high-rise hotel suite.
The Las Vegas shooter's motive remains unknown, but his recent travel history may provide investigators with some clues as they piece together a profile of the killer.
An entrance to Mandalay Bay on the Las Vegas Strip is blocked with police tape on Friday, Oct. 6, 2017, five days after a gunman in the hotel shot concert-goers across the street at the Route 91 Harvest music festival.
In one of the frequent press updates this week, Las Vegas Police Sheriff Joseph Lombardo said hotel employees are believed to have entered the room several times over the weekend and found nothing suspicious.
He said he felt it was unlikely Paddock could have pulled off the elaborate plan alone, though investigators have no idea who may have helped him.
Campos, though wounded, alerted the hotel's dispatch, "which was absolutely critical to us knowing the location as well as advising the responding officers as they arrived on that 32nd floor", McMahill said.
"I don't think they are after anything specific", Tanner said later.
Investigators have been looking into whether he was with a prostitute days before the shooting, were scrutinising cruises he took and were trying to make sense of a cryptic note with numbers jotted on it found in his hotel room, a federal official said on condition of anonymity.
Paddock's girlfriend, Marilou Danley, told FBI agents on Wednesday that she had not noticed any changes in his mental state or seen indications he could become violent, according to another federal official on condition of anonymity.
McMahill also acknowledged that the rumors and speculation have not been helpful to the investigation. McMahill said, there could be "a number of people out there that know that something looked out of place".