Ryan Briggs | WHYY

Police body cameras are a rare tool that can help secure criminal convictions and hold police officers accountable. The recordings theoretically make it harder for police to lie about what happened, and, in turn, for citizens to lie about police.

Internet sleuths have unearthed video from the Jan. 6 riot at the U.S. Capitol that appears to show Pennsylvania State Sen. Doug Mastriano was much closer to clashes with police than earlier statements about his whereabouts that day indicated.