A super PAC is airing a radio ad slamming Pennsylvania Lt. Gov. John Fetterman, the front-runner for the Democratic Senate nomination in the Keystone State, over a 2013 incident in which he chased down a Black jogger and held a shotgun while detaining him.

Collective PAC, which supports Black candidates, is airing the ad on Black radio stations in Pittsburgh and Philadelphia. The group has not endorsed a candidate in the Democratic primary, though two Black state lawmakers Rep. Malcolm Kenyatta and Sen. Sharif Street have entered the race.