TAMPA (WFLA) – A person who called 911 in August detailed a domestic dispute between Gabby Petito and her fiancé Brian Laundrie, adding that “the gentlemen was slapping the girl” during the altercation.

NBC News received a recording of the 911 call from Aug. 12 as a man described what he believed was a “domestic dispute” between Petito and Laundrie on Main Street near the Moonflower Community Cooperative

The man said the two people involved in the incident were in a white van with a Florida license plate, which Petito and Laundrie had used to travel through the area.

“We drove by him, a gentleman was slapping the girl,” the caller said, adding that the two people “ran up and down the sidewalk” before the man “proceeded to hit her.”

The caller said the two, later identified as Petito and Laundrie, got back into the van and drove off.

The call comes on the same day the couple was pulled over by police, about a month before Petito was reported missing.

During the incident with police, Petito told police had been “fighting this morning.”

After conducting their investigation that day, officers concluded this wasn’t a domestic assault as much as that of a mental health crisis.

Police identified Petito as the alleged aggressor and Laundrie, the victim. No charges were filed.

Meantime, the Teton County Coroner released the following statement to 8 On Your Side Investigative Reporter Mahsa Saeidi.

“The Teton County Coroner’s Office is performing an autopsy on yet to be identified remains on Tuesday, September 21. All information related to the autopsy and other findings will be released by the Public Information officer in the Denver FBI office.”

Brent Blue MD Teton County Wyoming Coroner

Petito had set off on a cross-country van trip with Laundrie in July. The 22-year-old was last heard from in late August and reported missing by her family in New York on Sept. 11.

Laundrie was last reported being seen by his family on Sept. 14 and has not been heard from since.