MIAMI TOWNSHIP, Ohio (WKRC) — More than three decades after an Ohio man disappeared without a trace, local police are still working to uncover what happened to 23-year-old Ronald Vonderheide. Despite a theory on his fate, authorities say they need more information to close the case, which has puzzled investigators since his disappearance on May 5, 1987. "It would be helpful to re-ignite the investigation so we could move forward,” said Lieutenant Greg Jenkins.