Speaking to Australia's Channel 7 News, Marilou Danley's sister, who did not want to be identified, claims Stephen Paddock sent her away to the Philippines, insisting Marilou had no knowledge of the planned carnage.
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"She was away so that she will not be there to interfere with what he's planning," the sister said.
The sister added, "She didn't even know that she was going to the Philippines until Steve said, 'Marilou, I found you a cheap ticket to the Philippines.'"
There is one thing the sister agreed on with investigators and the general public. Marilou Danley is the key to knowing Paddock's motives. Paddock committed suicide as police closed in on his location.
"No one can put the puzzles together. No one, except Marilou."
RELATED: Who is Marilou Danley?
The interview came in the midst of Danley's return to the U.S. She was met by federal agents when she arrived at Los Angeles International Airport on Tuesday night.
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Girlfriend of Las Vegas shooter returns to US, lands at LAX
Authorities had been trying to track down Paddock's girlfriend since the attack happened and found out she had been visiting family in the Philippines. She is considered a person of interest in the worst mass shooting in modern U.S. history that left 58 people dead and more than 500 wounded.
According to sources, Paddock's live-in girlfriend, 62, was met by FBI agents to be questioned about what she may know about the attack and get a possible motive.
Authorities also want to know why Paddock wired $100,000 to an account under Danley's name in the Philippines the week before the massacre. It's unclear if the money was for her, her family or some other purpose.
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