A bystander called Moab, Utah, authorities to report that Brian Laundrie was seen striking his girlfriend, Gabby Petito, during an Aug. 12 domestic dispute, Fox News reported.
What's a brief history here?
Authorities declared Laundrie a "person of interest" in Petito's disappearance after he came home to Florida from a cross-country trip in Petito's van without her.
Laundrie inexplicably went missing last week, and local authorities have embarked on a manhunt to discover his whereabouts after he reportedly went for a hike in a Florida swamp preserve.
Authorities on Sunday discovered remains in Wyoming's Grand Teton National Park that they said were consistent with Petito's description. An autopsy to confirm the findings and possibly determine the cause of death is scheduled for Tuesday.
Petito was reported missing on Sept. 11 after falling out of contact with her family in late August.
What are the details?
Fox News reported Monday that an unidentified male 911 caller phoned in a "domestic dispute" to Moab police and was heard telling a dispatcher that the "gentleman was slapping the girl" and "proceeded to hit her" before the two drove off in their vehicle.
"We drove by and the gentleman was slapping the girl," the caller said.
Fox News obtained audio of the call, in which the dispatcher can be heard saying, "He was slapping her?"
"Yes," the caller responded. "And then we stopped. They ran up and down the sidewalk. He proceeded to hit her, hopped in the car, and they drove off."
The 911 call apparently contradicts a previous police report on the incident in which a responding police officer named Petito as the primary aggressor in an incident that was categorized as a "mental/emotional health break" rather than a domestic assault.
"Police said the couple agreed to spend the night separately instead of charges being filed," a portion of the original report noted.
Fox also noted that the 911 call apparently contradicted the police report, in which a responding officer added that "no one reported that the male struck the female."
Last week, police released bodycam footage of Petito and Laundrie's interaction with police.
The footage showed an inconsolable Petito crying and attempting to explain what had happened between the two before police stopped their van.
"I have really bad OCD," she told one of the responding officers. "I was apologizing to [Laundrie] saying 'I'm sorry I'm so mean.' We've been fighting all morning. He wouldn't let me in the car before ... he told me I needed to calm down."
The officer then asked Petito if Laundrie had struck her, to which she responded, "I guess."
She gestured to her chin in a grabbing motion and said, "He, like, did that with his hand."
In a separate interview, Laundrie told the officer that Petito "just gets worked up sometimes."
"I try to distance myself from her," he added. "I locked the car. ... I said, 'Let's just take a breather.' She had her phone. I was trying to push her away to say, 'Let's just take a step back.'"
Laundrie at that point said that Petito struck him with her phone.
In the police report, it was noted that at "no point" during Petito's interview did she "stop crying, breathing heavily, or compose a sentence without needing to wipe away tears, wipe her nose, or rub her knees with her hands."