BRISTOL TOWNSHIP, Pa. — A man considered to be a leader in the group that organized out-of-control meetups in Philadelphia in Septemberwas arrested Friday by. A large group of vehicles gathered for an illegal car meetup in Northeast Philadelphia on Sept. 21, one of a dozen in the city that weekend, according to Philadelphia police. The cars were involved in what police described as "dangerous behavior" including drifting, starting fires and vandalizing police vehicles.