The leader of the Proud Boys has cooperated with the police before to help convict others.

By BY ALAN FEUER from NYT U.S. https://www.nytimes.com/live/2021/01/27/us/biden-trump-impeachment/the-leader-of-the-proud-boys-has-cooperated-with-the-police-before-to-help-convict-others?partner=IFTTT