I have no idea.
I did see a sting go down once. I was on my way to school one morning (this was on the east side) and always passed a cop substation, anyway one particular morning there was well over a hundred cop cars. I knew something was going down. That night it was on the news that a big sting drug bust got it. It took many man hours and lots of patience to do it.
For all those that put their life on the line to protect us. thanks.