Franklin David Harder was 25 when he was last seen on April 23, 1978, in Idaho County, Idaho. He worked as a caretaker for a property in the Burgdorf area owned by a couple from Riggins and was described as a loner with an eccentric personality. Because he wasn’t reported missing for ten days, early searches were delayed and hampered by adverse weather and uncertainty about where to begin.

Searches continued intermittently through the summer of 1978 but turned up no trace of Harder. He is described as a white male, brown hair, brown eyes, about 6 feet 2 inches tall and 185 pounds, with a scar on or near his right eyebrow/right eye. The Idaho County Sheriff’s Office manages the investigation and the case is listed in NamUs as MP2067.

Very little is known about his disappearance and the case remains open. If anyone knew Franklin, the Burgdorf property, or was in that area in late April 1978, what information can be shared with investigators?