On Tuesday night, Paddock's girlfriend, 62-year-old Marilou Danley, returned to the USA from the Philippines, where her sisters say Paddock had surprised her with a ticket and encouraged her to get out of town.
The girlfriend of Stephen Paddock, the Las Vegas gunman who killed 59 people in one of the deadliest mass shootings in history, has said that she had no prior knowledge of the attack, the media reported.
Lombardo said that law enforcement has spent the last three days questioning those who know Paddock.
USA authorities are at a loss as to how Paddock, a 64-year-old gambler and retired accountant, hauled a vast arsenal of weapons to his hotel room and launched his assault.
A law enforcement official said that she returned to the U.S.in order to "clear her name".
Authorities have described Danley as a person of interest in the case, although they have not suggested that she was involved.
Additionally, her sisters said Paddock wired Danley $127,000, without elaborating.
"And as he was descending into hell, he wanted to try to take care of her", Eric said.
Lombardo said investigators were examining the possibility Paddock's purchase of more than 30 guns in October 2016 may have been precipitated by some event in his life.
Danley arrived at Los Angeles International Airport on Tuesday night from Manila, Philippines.
"I anticipate he was looking for anybody coming to take him into custody", Lombardo said.
Reynaldo Bustos, her brother, told ABC News that he spoke to his sister following the shooting.
Danley, who uses an Australian passport, traveled to her home country of the Philippines on September 15, according to travel records obtained by ABC News.
Police say he shot at officers as they broke the door, but by the time they made it into the suite, Paddock had committed suicide. While there's still not much information pertaining to his motives, the police continue to investigate what happened that night.
This could be the same $100,000 which a United States official said Paddock transferred to the Philippines in the days before the shooting.