Twenty-nine-year-old Anthony Smith of Philadelphia was among the four people charged Thursday with arson and related federal offenses.
They're accused of setting a Philadelphia police car and two Pennsylvania state trooper vehicles on fire during widespread protests.
RELATED: 4 charged for arson of police vehicles during May unrest in Philadelphia
On Friday, the group "Philly for Real Justice" called the charges against Smith baseless and accused federal agents of targeting him for exercising his First Amendment rights.
"We look forward to Ant being completely vindicating. These charges being dismissed," Robert Saleem Holbrook, executive director of the Abolitionist Law Center, said.
RELATED: Investigators used Etsy, LinkedIn to make arrest in torching of Philadelphia police vehicles