Maybe this is what you're looking for?
http://www.specialtyserpents.com/WHAInfo/WIHerpLaws.pdf
Scroll to your location. (Milwaukee if your info is right)
Says and I quote "South Milwaukee: All poisonous animals and reptiles including rear fang snakes, constrictor snakes
6 feet or more, crocodilians 30 inches or more, poisonous insects, snapping turtles prohibited."
"West Milwaukee: Any animal, reptile, amphibian or invertebrate that could be dangerous due to its
size, venom, or generally known propensities, any constrictor snake over 6 feet, all crocodilians and
carnivorous reptiles more than 12 inches prohibited."
So i'd say you're outa luck.