Bonnie was last seen in Oshkosh, WI on 08/12/1975. She was living with her sister in the Town of Menasha while she was going through a divorce. Town police said her husband called a few days before her disappearance because he wanted to take her out for her birthday and talk about the divorce. The couple went to several taverns in the Neenah and Oshkosh area before heading back to the residence where Bonnie was staying in the Town of Menasha, according to the town's police department. Her husband told police that while en route to the residence, an argument ensued and Bonnie got out of the car near the intersection of U.S. 41 and the former State 150 to walk home. She has not been seen since.