Most Wisconsin court records around this time were sent to the archives, and the archives chose which to keep and which to destroy. There's not any backups of any of it. It's absolutely annoying to me when I want to search for older cases for clues and I can't even look up if there was one. Newspapers are a good source here. But even with newspapers, I don't think you are going to get answers with a short jaunt, it's been over 40 years. I do look at the newspapers and there are caught burglaries, but nothing specifically in this area. For example, the durward's glen nun's house being ransacked never made the papers. I am supposing we only know about it because this missing person's case was never closed and it had info about it.They live there and I am supposing court records are out there for those guys , And for real , I do expect a short jaunt though records to help this kids case.
I did make the suggestion of looking into burglaries around then though to the sheriffs, but they got a tip about the tires and hubcaps - so I figure they already know who took them.