WAYNE, Neb. -- A northeast Nebraska man who was arrested after authorities found a marijuana grow operation during a murder investigation has filed a motion for a competency evaluation.

On Wednesday, lawyers for 30-year-old Carl Ruskamp filed the motion in Wayne County Court. Ruskamp made his appearance via video conference as he remains in custody.

Wayne County Attorney Amy Miller did not object to the motion, and Judge James G. Kube granted the request.

The Wayne County Sheriff's Office initially responded to the shooting death of 65-year-old Gerald Ruskamp last month.

The Sheriff’s Office has requested that the Nebraska State Patrol lead the investigation. NSP spokesperson Cody Thomas said as troopers and deputies from Wayne and Cuming Counties worked to secure the scene and surrounding area, they discovered a marijuana grow operation on the property.

Carl Ruskamp and his uncle, 64-year-old Duane Ruskamp, were both arrested on charges related to the grow operation.

Gerald Ruskamp was the father of Carl Ruskamp and the brother of Duane Ruskamp.

There have been no arrests made in connection to the death of Gerald Ruskamp. 

The investigation remains ongoing.