(KNZA)--A Holton man accused of fatally shooting his father and shooting at Jackson County law enforcement officers during a standoff in September will under a competency evaluation.

Jackson County Attorney Shawna Miller tells MSC News a judge granted a motion filed by the attorney for 49-year-old Derrick Bohnenkemper for the mental evaluation.

Miller says his preliminary hearing, which had been set for Wednesday, was continued indefinitely.

Bohnenkemper faces one count of first-degree murder, five counts of attempted capital murder and one count of aggravated assault.

He’s charged in the shooting death of his 73-year-old father, Gaylen Bohnenkemper.

He was found inside a residence north of Holton after the younger Bohnenkemper ultimately surrendered to authorities following a more than 5 hour standoff early September 18.