From After Capitol riot, police chiefs work to root out officers with ties to extremist groups:
National Sheriffs’ Association President David Mahoney said many police leaders have treated officers with extremist beliefs as outliers and have underestimated the damage they can inflict on the profession and the nation. “As we move forward,” [Mahoney said], “we need to make sure we are teaching our current [police officers] that they must have the courage to speak out when they know about another deputy’s or officer’s involvement. There should be no reference to the thin blue line.”