Was it illegal? I don't know, everywhere is different. Many places only allow LEO to park in no parking zones during an emergency, some allow them to use the zones at any time. If it is illegal, and it's not worth it to enforce it on everyone, it's not worth it to force it on ANYONE. I think "wielding the hammer down hard" is a bit much. I don't think a 12 year old can do this, but the fact remains that if a law is being broken, even if it's a minor law, and even if it's an LEO, they should be forced to move their car or receive the fine. When you start allowing certain people to get away with small things, they move on to getting away with bigger and bigger things. Cops are now getting away with MURDER, and it's probably all began with one of these minor rules being broken and disregarded.