Employees at a Starbucks where Las Vegas shooting suspect Stephen Paddock was a regular said that he verbally berated his girlfriend in public.

Esperanza Mendoza, a manager at the Starbucks in the Virgin River Casino in Mesquite, Nevada, where Paddock lived, told the Los Angeles Times that he was frequently verbally abusive to his girlfriend Marilou Danley, who police are treating as a person of interest in the mass shooting investigation.

“It happened a lot,” Mendoza told the newspaper.

Paddock was known to be an avid, high-stakes gambler, and reportedly gambled with $160,000 the week before the deadly massacre, which killed 59 people and injured more than 500.

Mendoza recounted an incident in which Paddock allegedly lashed out at Danley when the couple had ordered their regular coffees — a venti mocha cappuccino for him; a medium caramel macchiato for her — and she asked for his casino card, which has credits earned from electronic gambling machines that can be used as currency in casino shops and restaurants.

“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,'” Mendoza told the Los Angeles Times.

“Then she would softly say, ‘OK’ and step back behind him. He was so rude to her in front of us.”

On Tuesday, Clark County Sheriff Joseph Lombardo told the New York Post that Danley was a person of interest in the mass shooting investigation. She returned to the United States from the Philippines Tuesday night, and FBI agents met her at the airport, according to the Associated Press. 

[Feature photo: Twitter]