[ sound of gunfire ] today state officials announced the officer who fired his weapon, mark hanneman, will face no criminal charges. to charge a case like this would simply be wrong reporter: after a two-month review and now the promised release of all body cameras including hahnemann s, investigators say the officer followed the law after video shows locke holding his registered gun aimed toward hanneman, though his finger was not on the trigger hanneman told investigators, i felt if i did not use deadly force, i would be killed. it would be unethical to file charges in a case in which we know we would not be able to prevail. reporter: as protests erupted after the shooting, police came under intense scrutiny for killing the 22-year-old, who was not a suspect in their case, while executing a no-knock warrant, a practice now banned in the city this is not over. you may have been found not guilty, but