SLCPD

The SLCPD implemented a policy of not responding to unverified alarm activations in September of 2000.

His murder spree is stalled when off-duty Ogden police officer Ken Hammond, eating with his wife in a mall restaurant, hears the shooting and "runs to the sound of the guns." Hammond is armed only with a subcompact .45 loaded with six rounds, but his return fire pins down the killer long enough for SLCPD to arrive, and the killer dies in front of their MP-5 and AR-15 fire.

To the best of my knowledge, this was first taught by Dennis Tueller of the Salt Lake City Police Department (SLCPD) while teaching an officer survival course at the Chapman Academy of Practical Shooting.