The Brief Wisconsin investigators are excavating a home's basement in connection to the disappearance of Robert "Bobby Joe" Fritz. Investigators are conducting a large-scale basement excavation at a Fond du Lac County home in connection to the 1983 disappearance of Robert "Bobby Joe" Fritz. Robert "Bobby Joe" FritzThe backstory:Fritz vanished while playing with siblings outside his Campbellsport home on May 14, 1983. The large-scale excavation currently underway inside the home's basement is a result of what was found. Investigators are excavating the basement of a Campbellsport home tied to the May 14, 1983, disappearance of Robert 'Bobby Jo' Fritz.