11-99 is a code that means send all the cops that are vertical, I'm about to die without an army showing up RIGHT NOW to help

It's a guess that mot many cops live through those situations. This guy did.

The ones that don't make it are honored by the 11-99 Foundation to help their surviving family http://www.chp11-99.org/

If you want to dig a little deeper http://officerinvolvedshootings.blogspot.com/?zx=aede1ce78263df74 is written by a cop in training. From his persective it comes across a lot different than you get from television or movies