(Calhoun County, Iowa) – A northwest Iowa man missing for more than a month was found dead today (Friday), in Jolley (Iowa). The Calhoun County Sheriff’s Office reports 54-year-old Mark Riesberg, of Rockwell City, was found in a Chrysler PT Cruiser with an apparent self-inflicted single gunshot wound. Foul play is not suspected, but an investigation is ongoing. His body was sent to the State Medical Examiner for autopsy. The Sheriff’s Office was assisted by Calhoun County EMS and the United Cajun Navy group during the initial response.

Mark Riesberg

His employer in Lytton had reported him missing on November 1st.  The Calhoun County sheriff had said previously that Riesberg’s last known contact with anyone could be traced back to Oct. 28th. His sister, Mary Brown, said Reisberg’s phone and wallet were found in his home, but his tan PT Cruiser was gone.

The search for Riesberg comes to an end with the discovery of his body. Search efforts continue, however, for 53-year-old David Schultz, of Wall Lake, who disappeared  in neighboring Sac County. Schultz was reportedly last heard from Tuesday morning, November 21st. His wife Sarah said her husband’s truck was found northeast of Sac City, parked on northbound U.S. Highway 71, about five miles north of the old U.S. Highway 20 intersection. The truck was reportedly turned off but wasn’t pulled over and the trailer was still loaded with young pigs.

The United Cajun Navy, a Louisiana-based nonprofit organization that performs search and rescue operations, as of Thursday, had reportedly covered close to 50-thousand acres of land in the effort to find him. The group resumed operations Friday morning.

David Schultz