Twelve Years for Knife Attack on Tribal Land | Pierre News

A 27-year-old man from South Dakota, Gradyn Blue Arm, received a 12-year federal prison sentence for voluntary manslaughter after stabbing a victim to death on tribal land in June 2025. The case, prosecuted under the Major Crimes Act, involved a volatile confrontation that escalated when Blue Arm returned armed with knives. He pleaded guilty in April 2025 and is already in custody. His sentence includes three years of supervised release and a $100 assessment fee — a stark warning about how quickly violence can spiral and the legal consequences that follow. Listen in comfort:Get a discount on a Soli Pillow: http://solipillow.com/discount/dnn. Advertise on DNN:[email protected] This is an automated, high-level news summary based on public reporting.Report issues to [email protected]. View sources & latest updates:https://sources.thednn.ai/24b025e28527085a