Suspected Las Vegas gunman Stephen Paddock wired US$100,000 to the Philippines last week, days before committing the deadliest mass shooting in United States history, NBC News reports.
Paddock's "friend", Marilou Danley, a 64-year-old Filipino-Australian, was out of the United States when Paddock shot and killed 59 people and wounded more than 525.
Danley, who is said to be on holiday in Japan with three girlfriends, lived a luxury life in a scenic desert resort-like retirement village 100km north of where Sunday night's shooting took place.
It is still unclear whether Danley was Paddock's girlfriend, as US reports say he was going through a divorce before carrying out the massacre, which ended when he killed himself.
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In some reports, she has been described as a "room mate" and on her now-deleted Facebook page, a friend refers to her partner by the name of "Gary".
But the one-time hostess in the high-roller room of a Nevada casino appears to have lived with him in the affluent Mesquite, Nevada, retirement community, Sun City.
She, too, was previously married to an American man from Arkansas, with whom she had one daughter.
Danley married Geary Danley in La Vegas in 1990 and they later divorced.
On Facebook she describes herself as a "proud Mum and grandmother".
In one Facebook post, Danley describes her daughter and her granddaughter, who is a fourth grader, as "my 2 precious jewels and love of my life!".
Danley, who it is believed was born in the Philippines, is reported to have lived on the Gold Coast in Queensland 20 years ago.
Danley and Paddock appear to have been familiar with the location of Sunday's mass shooting.
In 2014, Danley checked into the Mandalay Bay Resort and Casino, where Paddock was renting a room before he carried out the shooting.
It is believed Danley attended the 2014 version of the same concert where the massacre took place, the Route 91 Harvest country music festival.
Last year, Danley travelled to Dubai, and appears to have visited family members there.
Sun City in Mesquite boasts an 18-hole golf course, a clubhouse and swimming pools.
Sun City is regarded as a safe community, with one of the lowest crime rates in the state of Nevada.
Paddock bought his home there in January 2015, for $369,000.
US reports say that on top of his divorce proceedings, Paddock had a gambling problem.
After first describing her as a "person of interest" in the aftermath of the massacre, Nevada Police have completely cleared Danley of any connection to the crime.