That happens, but part of why that happens is how LEO vs private citizen enounters differ. A private citizen in that boathouse/whatever it was scenario would have likely bugged out without firing any shots. Actively hunting down, approaching, and apprehending the suspects can result in far different shooting scenarios than self defense (or even defense of a third party)
Then again I do seem to recall an officer with a backwards facing (inoperable) sight on their rifle out looking for those suspects having their pic go viral