So it looks like there is DNA on this one, per this article.
“For the past 40 years, authorities in Sauk County have worked with DCI to try to solve Staes’ murder. Zunker said he is actively reviewing evidence gathered at the scene to determine what should be resubmitted to the state crime lab. There is a chance Staes’ killer could have DNA in the system.”
“For the past 40 years, authorities in Sauk County have worked with DCI to try to solve Staes’ murder. Zunker said he is actively reviewing evidence gathered at the scene to determine what should be resubmitted to the state crime lab. There is a chance Staes’ killer could have DNA in the system.”