Fourth arrest announced as investigation into violent Cincinnati brawl continues

The other suspects arrested so far in connection with the incident have been identified as Jermaine Matthews, Montianez Merriweather and Dekyra Vernon.

"Let me be clear, there is no place for violent crime in Cincinnati, whether it's fight or gun violence, we will pursue those responsible and we will hold them accountable no matter who they are, period," Cincinnati Mayor Aftab Pureval said at a news conference on Friday.

The brawl took place between Elm and Fourth Streets and videos of the beatdown quickly went viral on social media. The footage showed a mob attacking two people, including a woman who was knocked unconscious while bystanders filmed.

"She's a single working mom who went to a friend's birthday party. It's unconscionable that there were no police present in that area of Cincinnati on a Friday night, or even an ambulance to take her to the hospital," he said. "Hard-working Americans shouldn't have to worry for their safety when they have a good time in our cities."

"That is unacceptable to not call the police," Theetge said. "Traffic was horrendous. People saw this. They were fighting in front of traffic. Why didn't people call us?"

During a news conference on Friday, Theetge called the brawl "an act of violence that shook us all." She also vowed that all those involved in the attack would be held accountable, and reiterated her call to the public to alert law enforcement when they see violence taking place.

"Trust me when I say this: had the Cincinnati Police Department been notified in real time, our officers would have responded with urgency and force to protect life," Theetge said at the news conference on Friday.

"The FBI has been and will continue closely coordinating with the Cincinnati Police Department on this matter," the federal law enforcement group told Fox News Digital on July 30.

Fox News' CB Cotton contributed to this report.