The autopsy report on a northwest Iowa man finds he was not a murder victim, though authorities believe the man’s wife was killed by his adult son.Autopsy results show Donald Neunaber died from natural causes.

Donald Nuenaber, along with his wife, Esther, were found dead in their rural Akron home on July 9th. Jonathan Neunaber, the son, has been charged with first-degree murder in the death of his mother, and is currently in the Plymouth County Jail under a bond of $100,000. His trial has been scheduled for December 9th.

 The Plymouth County Sheriff’s Office and the Iowa Division of Criminal Investigation and the Plymouth County Attorney’s office are working cooperatively to investigate the case.

(Reporting by, Dennis Morrice, KLEM, Le Mars)