Heres a good example of “layered defense”:
On January 15, 2009, at 10:50 p.m., a Sacramento County Sheriff’s deputy stopped a vehicle in the area of 44th Street and Perry Avenue. The deputy approached the vehicle, which was occupied by a 58-year-old male driver and two female passengers (53- and 41-years-old respectively). He asked the driver to step out of the vehicle so he could speak to him behind the car. As the deputy and driver were standing behind the car, the driver attacked the deputy. During the ensuing struggle, the deputy felt the suspect grab his handgun in an attempt to remove it from its holster. As he fought with the suspect to maintain control of his gun with one hand, and believing he was in imminent danger of death or great bodily injury, the deputy drew a knife from his duty belt with his free hand and stabbed the suspect in the upper body. The suspect stopped fighting at that point and was handcuffed by the deputy. Paramedics transported the suspect to a local hospital where he is being treated for his wounds. He is expected to survive. The two female passengers were detained for questioning.
In accordance with the Sacramento County Sheriff’s Department’s policies and procedures, the 27-year-old male deputy (a six-year veteran of the department) will be placed on paid administrative leave. Sheriff’s patrol deputies are authorized by the department to carry a knife during the performance of their duties. The circumstances surrounding this incident will be investigated by the Sacramento County Sheriff’s Department’s Homicide Unit, Internal Affairs Unit, and the Sacramento County District Attorney’s Office.
After he is deemed to be fit for incarceration, the suspect will be booked into the Sacramento County Main Jail. His name and booking photo will be released at that time.
A good example of how its not a matter of “whats better” as much as its an issue of “focusing on the enemy” and applying whatever tool is necessary to accomplish your mission.