An officer was attempting to break up two teens involved in an altercation near Upper Darby High School in Upper Darby Township, Pa. when one of the teens attacked the officer. Soon after, the other teen began attacking the officer, and then a crowd that had gathered to watch the fight advanced on him as well. A resident of the neighborhood, and Right-to-Carry permit holder, became aware of the situation, retrieved a gun and confronted the mob. The resident was able to stop the group from attacking the officer until additional police could arrive.
Following the incident, Upper Darby Police Superintendent Michael Chitwood told a local media outlet, “If it wasn't for the good Samaritan stepping forward, he'd have been dead meat… There's no doubt they would have attacked him.” (Philadelphia Daily News, Philadelphia, Pa. 02/10/16)
http://www.philly.com/philly/news/20160210_Police__Gun_owner_saved_cop_from_attack_by_kids.html