When I lived in suburban Chicago, the cops set up a listening post in an empty apartment in the building next to me.
They tapped the phones on maybe 20 or 30 Mexicans for dealing drugs. Every night at midnight a cop would show up to pick up reports. They ended up busting quite a few of them.
Little did they know I was doing the do myself. I always had women and money and a lot of that other stuff. Plus I had the ammo safe in the closet. LOL