According to a press release from the LVMPD, the two got in an alteraction over a cell phone. "The victim was alleged to have been battered by Brown, who at the same time took her cell phone," the press release read. "A verbal altercation took place as the victim was escorted out of the room by private security and into the hallway."
Gutierrez, a Brazilian model, was escorted off the hotel property because of the disturbance, but she later returned to file the report. Detectives could not reach Brown in his suite and later learned he had left the hotel before officers arrived at the scene.
The investigation is still ongoing, and the LVMPD have not heard from Brown at this time. ET has also reached out to Brown's lawyer and the alleged victim.
Brown's rep, however, confirms the victim's name and that she was escorted out of the party, telling ET that Gutierrez had a "total meltdown" in the hallway, with people waiting to get into the soiree witnessing her "throwing her purse to the ground and claiming that she 'could buy everyone in the hotel.'"
"Her claim that she had her phone in her possession inside the after party and was able to take a photo causing an altercation with Chris Brown is a complete fabrication," Brown's rep says.
"Making false accusations seems to be a pattern of behavior for Ms. Gutierrez. Whatever her motives, her statements are unequivocally untrue," the rep added.
Just last month, Brown candidly opened up to Notion magazine about problems in his past.
"People make mistakes -- I've made mistakes -- I've judged people who made mistakes, and they judge me back," he explained. "The best part about it is me having to learn ... I thank God he had something bigger for me to do."
"The mindset I was in when I was younger, it was full of arrogance -- like, 'Yeah, I'm an a**hole like, so what, f**k it, I got money,' and you know, at the end of the day everybody knows right from wrong," he continued.
As ET previously reported, Brown pleaded guilty to a felony assault and accepted a plea deal in 2009 after a physical altercation with then-girlfriend Rihanna after Clive Davis' pre-GRAMMY party that February.
The "Diamonds" singer dated Brown again in 2013, but called it quits several months later. In October, she opened up about their controversial relationship in an interview with Vanity Fair.
"I was that girl -- that girl who felt that as much pain as this relationship is, maybe some people are built stronger than others. Maybe I'm one of those people built to handle s**t like this," she said about her state of mind at the time. "Maybe I'm the person who's almost the guardian angel to this person, to be there when they're not strong enough, when they're not understanding the world, when they just need someone to encourage them in a positive way and say the right thing."
Hear more from her tell-all interview in the video below.