10%!?!?!
My experience has that number at much higher across most professions, especially high when it comes to government or large corporate employees. With police specifically it's about 50/50, and I've numerous friends on the 'force'.
There is no evidence to support that. 95% of police officers will never fire their weapons in the line of duty in their career. With video becoming more prevalent, accountability is on the rise, rather than the reverse.
Look, there is always room for improvement. This is a terribly difficult profession, it requires way more training, discipline, and accountability that your average job. But buying into negative stereotypes is pointless, and perpetrating them only worsens the situation.