DEMANDING JUSTICE FOR DONNELL BURNS

MY 23 YEAR OLD SON DONNELL BURNS WAS KILLED AT A WALMART .THE CASE WAS RULED A HOMICIDE BY THE MEDICAL EXAMINER..BUT STILL NO JUSTICE HAS STARTED.. Y SON WENT TO WALMART AND A SECURITY GUARD KILLED HIM CHOKED HIM TO DEATH...I WANT AND NEED TO STOP THIS FROM HAPPENING TO ANYONE ELSE'S LOVED ONE.