The Police said gunman Stephen Paddock set up cameras inside his hotel suite and in the hallway.
Ms Danley voluntarily flew back to Los Angeles from the Philippines on Tuesday night to speak to the Federal Bureau of Investigation, just over two weeks after Paddock had surprised her with a "cheap ticket" to enable her to visit her family.
"She was probably one of the only people I've ever seen that he'd go out of his way to do a little thing for".
"Like all Filipinos overseas, I was excited to see family and friends", Danley said in her statement. "The investigation with her is ongoing and we anticipate some further information from her shortly", he told reporters.
"He sent her away.She didn't even know that she was going to the Philippines, until Steve said, 'Marilou, I found a cheap ticket to the Philippines, '" one sister said.
On Oct. 3, two days after the shooting, Danley returned to the US met by federal agents.
Investigators named Danley as a "person of interest" in the investigation into the shooting deaths of at least 58 people by her boyfriend Steven Paddock, 64, at a music festival in Las Vegas on Sunday night.
Stephen Paddock, the man who let loose a barrage of bullets on the Las Vegas Strip in the worst mass shooting in modern history. On top of the shooter's motives, authorities want to ask Danley about her knowledge of a $100,000 wire transfer to an account in the Philippines.
"He sent her away so that he can plan what he is planning without interruptions". He said many of those he met had been wounded as they sought to help others amid the hail of bullets.
Danley has released a statement to say she had no idea Paddock - who she described as "quiet and kind" - had been preparing to commit an atrocity.
Stephen Paddock opened fire on a crowd in Las Vegas.
Lombardo said Wednesday night that investigators were trying to figure out whether Paddock had any help collecting his arsenal or planning the rampage, which has been found to be meticulously planned.