Support WBUR'Let's Put An End To All This Madness,' Says Brother Of Slain Police OfficerPlay06:48Download AudioBill ChappellJuly 18, 2016 ShareA photo provided by Trenisha Jackson shows her husband, Montrell Jackson, holding his son, Mason, at a Father's Day event for police officers in Baton Rouge, La. Montrell Jackson and two other law enforcement officers were killed Sunday. (AP)