This is an excellent article from LawOfficer.com which covers the need for officer training that addresses the need for accuracy in the following areas:
The Will to Prevail
Communications with police officers worldwide confirm we all face the same issues of lawlessness and violence regardless of the nation, state or community we serve. These reports illustrate both victory and disaster in our fight. The many officers murdered or disabled prove our need for continued and upgraded training.
Training must mean more than the pursuit of paper records it must mirror the truth of the street. Unrealistic training gives officers unrealistic expectations of success, and unrealistic expectations that one technique or piece of equipment will always work on the street can and has led to disaster.
This article addresses basic physical and psychological preparation issues I believe are vital to establishing an officer’s ability to meet unlawful violence with lawful and justifiable force in the course of sworn duties.