There's a legitimate pizza place around me that's been around for ~50 years. My mom went to school with the owners children and when she was in high school their dad had a small stint in jail for tax evasion and unregistered and hot guns. Apparently he was importing a lot of guns from Italy and one day a shipment got caught. About 10 years ago, my mom became friends with someone who was hired to do their taxes. She didn't give any details, but she told us the numbers really didn't add up and she had to drop them as a client their first year due to ethical reasons.

The thing is the pizza is really good and kind of an institution in my town. I wouldn't say it is strictly a front, but money does move through it. The family also owns a lot of small strip malls in the tri county area and some historical properties as well.

Oh and one of the sons married one of their 2nd/3rd cousins from Italy in the 90s. The rumor was it was just to help her get citizenship but they are still married to this day and it's kinda weird.