We recommend this article from the Pew Research Center: A closer look at police officers who have fired their weapon on duty. The researchers collected data about officers who have and have not fired their weapon while on duty. Only about one quarter of all police officers have ever fired a gun while on duty. The study shows several interesting links; for example, white officers and male officers are more likely to fire their gun than non-white officers and female officers. Whether or not an officer has fired their weapon also correlates with the officer’s opinions on topics such as gun ownership, use of physical force, and equal rights.