LE MARS, Iowa (AP) — A May trial has been scheduled for a man accused of killing his mother in northwest Iowa.

Jonathan Neunaber has pleaded not guilty to first-degree murder in the July 2014 slaying of 80-year-old Esther Neunaber at her home in rural Akron. Her body was found with the body of her husband, Donald Neunaber. Prosecutors say that while Donald Neunaber died of natural causes, Esther Neunaber was beaten to death.

In January Jonathan Neunaber was found mentally fit to stand trial, which is set to begin May 10.

(© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)