Richard and Shirley Robison decided to spend the summer with their four children at their vacation home near Good Hart park, as they typically did. Their log cabin was located in the north woods on the shore of Lake Michigan. Secluded among the dense forest, the cabin was nearly impossible to see from the road. This peaceful area provided the setting for a gruesome massacre that remains unsolved more than 50 years later.

SOURCES

https://www.northernexpress.com/news/feature/case-closed/

https://www.goodhartstore.com/userfiles/filemanager/27kvhxrplzrfchd58vo1/

When Evil Came to Good Hart – June 25, 2008; by Mardi Link