Ronnie Ortiz-Magro’s Ex Jen Harley Was ‘Pummeling His Face’ in Front of Daughter Before Arrest

Ronnie Ortiz-Magro and Jen Harley got into a heated argument before she was arrested for domestic battery on Sunday night.

A source tells PEOPLE the Jersey Shore star and his ex initially got into a “verbal fight” at a barbecue with friends that day. According to the source, they left with their 12-week-old daughter in the backseat of the car. On the drive home, “the fight escalated” and Harley “was pummeling his face,” says the source.

“He was screaming for her to stop the car as she was driving,” says the source. “She hit the median and got a flat tire which caused her to slow down. He begged to get out and opened the door but she continued to pull away while he was getting out and it tore up his entire arm. It’s a mess from road rash and from being dragged along the street as he was caught in the belt.”

According to the source, “someone on the road saw this happening and called the police.”

“By the time it was said and done there were four flat tires,” says the source. “Police arrived and spoke to the many witnesses. They saw Ron’s arm and spoke to him…