So why don't we see active shooters hit Police stations, military bases from the exterior, etc.? Why don't we see robbers try the Federal Bullion Depository (Ft. Knox) or one of the Federal Reserve banks? An active shooter is motivated by the desire to make as big a statement as possible, using the biggest body count possible. Not in dying in a hail of gunfire that barely gets 5 minutes of the 10PM news. This does not mean that they only go for gun free zones. However a large number of soft targets ARE gun free zones. Double bonus.
I'm a full time LEO, I can tell you that if a civilian goes out and shoots more then 50-100 rounds more then twice a year they shoot and train more then 90%+ of LEO's. Of course your local agencies might be the exception, but by an large most cops are not shooters. It's a very small part of our job, and most cops don't really shoot out side of their mandated requirements. If you've got a janitor, lunch lady, teacher, coach, crossing guard, etc. that takes their CCW seriously and has made an effort to become proficient and skilled, they probably have better technical ability to make the shot then your average LEO. Do LEO's have an advantage in tactical training to find and close with the shooter, yep. But the idea there is we're having to hunt for the bad guy, running to the sound of the gunfire and ending the threat isn't a difficult thing to figure out.
-Jenrick