Derek Chauvin’s Murder Trial Is Smashing Cops’ ‘Blue Wall of Silence’ “To rally around Chauvin and say, ‘This is policing as normal, this is acceptable practice,’ would risk greater harm to the reputation of the police than basically just coming forward and saying, ‘This is not who we are, and this is not what we do,” Daniel Medwed, a criminal justice professor at Northeastern University’s School of Law, told VICE News. “I think all of them are aligned with coming forward and saying Chauvin is outside of our group: that he is a bad apple but we are a good tree.”