During questioning by investigators this week, the girlfriend of Las Vegas shooter Stephen Paddock shed some light on his mental health in the days before the horrific massacre that left at least 58 dead and more than 500 injured. Authorities hoped Marilou Danley could help them determine what may have led Paddock to rain a hail of bullets on the crowd of some 20,000 people at a concert in Las Vegas Sunday. Danley, 62, told investigators she was concerned about Paddock’s recent mental health, according to CBS News.

“She said he would lie in bed, just moaning and screaming, ‘Oh my God,’” a former FBI official who was briefed on the situation told NBC News.

Danley, who was in the Philippines at the time of the shooting, was questioned by authorities upon her return to the United States Tuesday. While she was not officially in custody, authorities described her as a “person of interest.” Her attorney, Matthew Lombard, said she had no knowledge of Paddock’s plans when she left the country. Instead, Danley believed Paddock purchased her a ticket to the Philippines and wired her a lump sum of money as a way of breaking up with her.

GettyImages-857173578 Belongings are scattered and left behind at the site of the mass shooting at the Route 91 Harvest Festival, Oct. 3, 2017 in Las Vegas, Nevada. Photo: Getty Images

“I knew Stephen Paddock as a kind, caring, quiet man,” Lombard said on Danley’s behalf in a statement to reporters. “I loved him and hoped for a quiet future together with him. He never said anything to me or took any action that I was aware of that I understood in any way to be a warning that something horrible like this was going to happen. It never occurred to me in any way whatsoever that he was planning violence against anyone.”

While Danley described her boyfriend as "kind" and "caring," conflicting accounts suggest a different reality. An employee at a Starbucks that the couple frequented told reporters she regularly saw Paddock verbally abuse Danley while they were at the store.

“It happened a lot,” said Esperanza Mendoza, the supervisor of the Las Vegas Starbucks. “He would glare down at her and say – with a mean attitude – ‘You don’t need my casino card for this. I’m paying for your drink, just like I’m paying for you.’ Then she would softly say, ‘Ok,’ and step back behind him. He was so rude to her in front of us.”

One of Danley's sisters told reporters in Australia she believed her sister had no indication Paddock was planning such a horrific act.

“I know that she didn’t know anything as well, like us,” the sister told Australia’s Channel 6 news, speaking on the condition of anonymity. “She was sent away. She was sent away so that she will not be there to interfere with what he’s planning.”

GettyImages-856805698 Remains of the garage door sit in the driveway in front of the house in the Sun City Mesquite community where suspected Las Vegas gunman Stephen Paddock lived, Oct. 2, 2017, Mesquite, Nevada. Photo: Getty Images