A rural Fairbank man, accused of killing his son, has been ordered to get medical treatment.

Daniel Niebuhr, charged with first-degree murder in the fatal shooting of 36-year-old Brock Niebuhr, had reportedly injured his hand while being held in the Bremer County Jail in Waverly. Authorities speculate that the injury was self-inflicted.

Niebuhr, 59, was allegedly not cooperating with jail personnel to receive medical treatment. The county attorney has petitioned the court, seeking permission to have Niebuhr legally sedated for an examination.

The murder suspect is also described as being belligerent with the jail staff.

Niebuhr's defense attorney is asking the court to bar authorities from any further questioning of his client. He claims Niebuhr is having trouble communicating, and that the state of his mental health is questionable.

The judge did order medical treatment for Niebuhr, who being held in jail on $2 million bond.

Bremer County sheriff's deputies were dispatched Niebuhr's residence west of Fairbank on March 22 to investigate a report that someone may have been stabbed and killed at the home. When authorities arrived, they found Brock Niebuhr's body.

Daniel Niebuhr initially admitted to shooting his son, while Brock sat on a couch watching television, investigators said. Authorities have not released a motive for the deadly shooting.