LEVITTOWN, Pa. (WPVI) — The man who police say helped organize and promote illegal activities car meets in Philadelphia last monthwhich quickly descended into chaos, was arrested.

Action News was there when Joseph Cavanaugh, 21, was arrested at his home in Levittown, Pennsylvania, Friday morning.

The encounters attracted hundreds of people to the city, leading to reckless driving and other dangerous behavior on the night of September 21-22. A police officer was injured.

“This is a very significant arrest today. He’s pretty much at the top of the organization when it comes to planning the event,” said Lt. Dennis Rosenbaum of the New York Police Department. Philadelphia. “This was a month-long investigation with several more arrests to come.”

Action News has learned a second arrest related to the encounters took place Friday. No additional details were immediately available.

Hundreds of people and vehicles gathered for a dozen drive-by rallies that resulted in thousands of dollars in damage and an injured police officer.

The meetings took place across the city, from Northeast Philadelphia to South Philadelphia, and concluded with more than 100 vehicles at City Hall.

Two weeks ago, police arrested Shane Thomas, 18, in Plymouth Township. Police say Thomas was the person seen in the video wear a banana costume to the event.

Thomas was allegedly seen committing a series of crimes, including damaging at least one police vehicle.

At least four more arrests were made. One of these suspects is accused of speeding with his Dodge Charger on two police officers.