When Cops Are Trained to Use Violence as a Policing Tool Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email A police lieutenant swings his baton at an Occupy Wall Street activists on Tuesday, May 1, 2012 in New York. ( Mary Altaffer / Associated Press ) Produced by Dana Roberson Produced by PRI and WNYC