America's Troubled Relationship with its Police

Guest: Samuel Walker, PhD, Emeritus Professor of Criminal Justice, University of Nebraska at Omaha Jury selection is underway in the trial of the Minnesota police officer who fatally shot Philando Castile last summer. Castile’s death was streamed on Facebook Live by his girlfriend and fueled the ongoing national debate over how police use deadly force and how they treat African Americans.  Samuel Walker explains the roots of America’s often fraught relationship with the police.