As more than 100 police officials dig into Paddock's past, trying to find a reason for why the 64-year-old Mesquite, Nev., man would open fire at a music festival, killing 58 and wounding more than 500 others, Lombardo says they have discovered the profile of someone "disturbed and unsafe".
Stephen Paddock's girlfriend Marilou Danley thought he had bought her a plane ticket to the Philippines and wired her $100,000 as his way of breaking up with her and had no idea he was planning a mass shooting, she revealed in a statement on Wednesday.
- Paddock wired $100,000 to the Philippines, a law enforcement source said.
As authorities struggle to find a motive for the attack, it has been revealed that his father Benjamin Hoskins Paddock, who went by alias "Big Daddy", "Chromedome" and "Old Baldy", was on the FBI's Most Wanted list from June 10, 1969 through May 5, 1977.
As of Thursday morning, 59 people, including Paddock, had died from the shooting with hundreds more injured.
Officers also found ammonium nitrate in Paddock's auto - the chemical compound used in fertilisers can be used to make bombs such as that used in the 1995 Oklahoma City attack.
Investigators said that Paddock was using some of Marilou's identification, but they do not believe she was involved in the shooting.
Police said Paddock killed himself before a SWAT team breached his room in the Mandalay Bay hotel overlooking the venue for the country music concert.More news: Google's wireless headphones can auto-translate
Investigators hope Danley may shed some additional light on the carnage, carried out by an individual with no criminal record, no known history of mental illness and no outward signs of social disaffection, political discontent or extremist ideology.
Paddock had 23 guns inside the suite, as well as hammers, LVMPD Assistant Sheriff Todd Fasulo said.
Sheriff Joseph Lombardo said Paddock fired through the door of his hotel room and hit a security guard in the leg. According to the Las Vegas Review-Journal, Lombardo said Paddock used Airbnb to rent a room.
Eric said his brother Stephen Paddock, a retired accountant, was "a wealthy guy", who "liked to play video poker" and "went on cruises".
At least 58 people were killed and 515 wounded in the Las Vegas massacre.
Housekeepers said they "saw no signs of anything" suspicious in the two-room suite, Nevada Rep. Dina Titus told CNN. But the White House said it would be "premature" to reopen the USA debate on tighter gun controls in the wake of the shooting.
It was the deadliest mass shooting in US history.
The massacre has no known link to overseas terrorism or terror groups, a USA official with knowledge of the case said.