The search of Stephen Paddock's three-bedroom house on a cul-de-sac in a retirement community in Mesquite, Nevada, came exactly a week after Paddock opened fire on a country music crowd, killing 58 and injuring almost 500.
The security guard had been responding to a door alarm on the floor when he heard drilling that he found odd, Undersheriff Kevin McMahill told KNPR on Tuesday.
Paddock opened fire on a country music event on the Las Vegas Strip from a hotel room at The Mandalay Bay before turning a gun on himself.
Investigators expect to release a definitive timeline of Paddock's actions prior to the shooting once it is complete.
Paddock shot and wounded a security guard who came to his floor at the Mandalay Bay hotel to investigate an open door down near Paddock's suite, Lombardo said, providing new details on what occurred immediately before the mass shooting.
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".
Crawford said she has spoken with Federal Bureau of Investigation agents and police officers about their friendship as authorities work to figure out a possible motive in the deadly attack. "What we know is that Stephen Paddock is a man who spent decades acquiring weapons and ammo and living a secret life, much of which will never be fully understood". According to police accounts, there was more than an hour between the moment the gunfire ended and the moment officers breached and entered Paddock's room, at about 11:20 p.m.
"I think probably the adrenaline is still running and I can't wrap my brain around what I saw", said Dori McKendry, a driver for rideshare startup Lyft.
"The sheer size of the space and the amount of personal items that were left there, it's just a huge undertaking", said Paul Flood, Unit Chief in the FBI Victim Services Division.
Police then said that after Paddock shot at Campos through the door, he didn't fire any more shots into the crowd.
"This individual purposefully hid his actions leading up to this event and it is hard for us to find the answers to those actions", Lombardo said.
"We believe he made a decision to take the lives he did and he had a very purposeful plan that he carried out", he added.
"Currently, we do not believe there is one particular event in the suspect's life for us to key on", the sheriff said. said.
"We have no evidence or intelligence that the suspect was linked or had affiliations with any no terrorist groups or ideology", Lombardo said.