The sequence of events that the FBI and other authorities have given for the Las Vegas shooting has now, officially, fallen apart: http://www.npr.org/sections/thetwo-way/2017/10/10/556828806/las-vegas-gunman-shot-security-guard-before-firing-into-crowd-police-say
“At a news conference Monday, Clark County Sheriff Joe Lombardo revised one of the key details on the reported timeline of events that night: when exactly shooter Stephen Paddock injured Jesus Campos, the unarmed Mandalay Bay security guard who came to investigate his floor.
“What we have learned is Mr. Campos was encountered by the suspect prior to [Paddock’s] shooting to the outside world,” Lombardo said. He told reporters Monday that Paddock shot Campos at 9:59 p.m. local time on Oct. 1, roughly six minutes before turning his gun on the crowd at the Route 91 Harvest music festival.
“Immediately upon being injured, [Campos] notified security of his situation,” Lombardo said. He added that Campos also prevented a maintenance worker from being shot. But Lombardo also acknowledged that police “weren’t aware of [Campos] being shot until they met him in the hallway after exiting the elevator” onto Paddock’s floor.”