A Fairbank man has been charged with first-degree murder in the shooting death of his adult son. The Des Moines Register reports that 59-year-old Daniel Niebuhr was charged Friday in the death of 36-year-old Brock Niebuhr of Dike. The Bremer County Sheriff’s Office says deputies responded Friday to a home in Fairbank. Authorities say Daniel Neibuhr told first responders that he shot his son. Deputies found Brock Neibuhr’s body inside the home. The sheriff’s office says Daniel Neibuhr told investigators that he walked up behind his son and shot him in the head as he was on a couch watching television. Authorities have not disclosed a motive.