ORANGE CITY—A 71-year-old Spirit Lake man was found guilty of second-degree murder for a second time Tuesday, Oct. 12, in Sioux County District Court in Orange City.

Gregg Eugene Winterfeld had been found guilty by another jury following a trial earlier this year, but a judge had ordered a new trial after an error was discovered in how the previous court proceedings were conducted.

The case arose following the shooting death of 58-year-old Grant “Willy” Wayne Wilson of Cleghorn on May 9, 2020.

Wilson spent the afternoon and evening visiting Winterfeld at Winterfeld’s mother’s rural Ireton farm home.

Wilson and Winterfeld spent much of the day drinking alcohol, according to Sioux County attorney Thomas Kunstle, who prosecuted the case on behalf of the state of Iowa in cooperation with the Sioux County Sheriff’s Office.

An argument developed and Wilson decided to sleep in a car parked in the driveway.

Winterfeld locked the home’s doors, put on a holster with a loaded .22-caliber revolver, exited the home and convinced Wilson to come back inside.

Upon re-entry, the argument continued and Wilson attempted to leave.

Winterfeld pursued him and unholstered his gun.

Wilson turned around and gave a threatening look, so Winterfeld raised his gun, shooting Wilson.

Winterfeld initially faced a charge of first-degree murder, a Class A felony, in a trial held March 30-April 7 in Sioux County District Court in Orange City.

The jury, however, found him guilty of second-degree murder. The verdict indicated the jury did not think Winterfeld’s action was premeditated, although the jury did affirm he used a dangerous weapon.

Before sentencing on May 28, District Judge Jeffrey Neary noted the law grants 10, as opposed to six, peremptory challenges to the state and defendant during the jury selection process for a Class A felony trial.

He ordered a new trial and released Winterfeld on bond.

Retrial began on Oct. 5 and on Oct. 12, at about 9 p.m., a second jury returned a guilty verdict of second-degree murder.

Winterfeld was taken back into custody pending a new sentencing hearing, which the district court has yet to schedule.

Editor's note: This story has been updated.