Washington D.C.- After Wisconsin police spent a mere two days investigating the police who shot and killed his son during a traffic stop in 2004, Michael Bell Sr. made it his mission to change how law enforcement in the state looked into officer-involved shootings.

He worked with police and sheriffs departments, lawmakers and criminal justice and law professors to require an external review takes place whenever an officer of the law shoots a civilian.

Bell tells Ben Swann how his son’s death has led to his involvement with the protests over Tony Robinson Jr.’s death in Madison.