SIOUX FALLS, S.D. (KELO) -- A Rapid City man has entered a guilty plea in connection to a deadly shooting. This week, 54-year-old Gregory Landers pleaded guilty to 2nd-degree manslaughter in the death of 30-year-old Acey Morrison. Former tribal treasurer pleads not guilty to theft Morrison was fatally shot at Landers' residence in August of 2022. Landers wasn't charged in the case until February of this year. He is scheduled to be sentenced next month.