Tow fees: Chicago suburbs cash in on towing - chicagotribune.com
Great expose by the Chicago Tribune that blows the lid off the auto impound racket. Municipalities have laws that allow the police to impound any vehicle involved in any way in any misdemeanor or felony, or some specified list of crimes, even something as trivial as an expired license or not having proof of insurance. Doesn't matter who was driving, ever if the owner was at home sleeping when it happened. The car gets impounded and then you have to pay hundreds of dollars to get it back. If you don't pay, you lose the car for good.
This is another of those municipal money grabs, like red light cameras and mandating that all new construction has to be in CIDs. There is also a map that shows the entire Chicagoland area with the details of all the various laws.