(Fond du Lac) Police say a 37-year-old Fond du Lac man has died after showing signs of medical distress in the back of a squad car. Fond du Lac police say the incident started when officers performed a traffic stop Sunday night. Police say the man who was driving the vehicle was out on bail and was taken into custody without incident for violating his bond conditions. Officers say the man began showing signs of medical distress while he was in the back of a police squad car. He was taken by ambulance to St. Agnes Hospital, where he later died. The name of the man was not released. An autopsy has been scheduled. For now, three Fond du Lac police officers are on standard administrative assignment.