This is why I don’t let cops lecture me about my gun rights, although my concealed carry instructor was a cop, but to his credit, he was very pro-gun.
A Lower Gwynedd police officer accidentally fired his gun while officers responded to a disturbance in which a man pointed his gun at officers during the early morning hours of Dec. 20.
….
As officers searched the outside of the house, they observed a person lying on the floor of a front room, police said. When police identified themselves, Bridges stood up, got a “dark colored revolver” from a closet and pointed it at an officer, according to police.
As the officer was retreating for cover, he slipped on ice and fell, unintentionally firing his gun, police said. The one round discharged from the weapon struck the house.
Source: http://www.montgomerynews.com/articles/2013/12/23/ambler_gazette/news/doc52b893d06b113423920548.txt
To be fair, he was in a dangerous situation, but even then, always practice gun safety.