New information in 43 year old missing child case leads to search warrant and building excavation

The Fond du Lac County Sheriff’s Office remains steadfast in its commitment to investigating unsolved crimes and cold cases, including an investigation into the disappearance of Robert
“Bobby Jo” Fritz on May 14, 1983.

On Thursday, July 16, 2026, Sheriff’s Office detectives executed a search warrant related to this case at the village of Campbellsport home Bobby Jo lived in at the time he went missing. During
the search, potential evidence related to the case was located. As a result of those findings, a larger scale excavation is currently taking place inside the basement of the home.

Detectives are currently working in coordination with agents from the Wisconsin Department of Justice Division of Criminal Investigation and the Crime Lab to identify, collect, and process any
additional evidence that may be located.

The Fond du Lac County Sheriff’s Office is dedicated to uncovering the facts surrounding Bobby Jo’s disappearance and bringing closure to his family.

As this remains an active and ongoing investigation, additional information will only be released at a time when it will not compromise case integrity.

You can learn more about the disappearance of Bobby Jo at: https://www.missingpersons.doj.wi.gov/missing/robert-bobby-joe-fritz

If you have any information you believe may be relevant to this case, please contact Detective Tyler Tikkanen at 920-929-3384. You can also leave anonymous information on the Fond du Lac County Tip Line by calling 920-906-4777.