Eagle Butte Man Stabs Victim to Death at Party

Corbyn Big Eagle, 22, of Eagle Butte, South Dakota, plunged a knife into a man’s chest during a chaotic brawl at a house party, killing him instantly—now he’s paying 15 years behind bars. The brutal attack on June 16, 2015, erupted after a verbal clash turned physical, ending in blood on the floor of Big Eagle’s own home.

U.S. District Judge Roberto A. Lange handed down the 180-month sentence on December 5, 2016, followed by five years of supervised release. Big Eagle was also ordered to pay a $100 special assessment to the Federal Crime Victims Fund. The sentence marks the end of a federal prosecution that began with a grand jury indictment on July 14, 2015.

Big Eagle admitted guilt on September 7, 2016, after evidence laid bare the sequence of violence. Witnesses confirmed that after the victim punched another man at the gathering, a third party intervened and wrestled the victim to the ground. That’s when Big Eagle vanished into the kitchen, returning with a large knife and driving it into the victim’s chest in one fatal motion.

The Cheyenne River Sioux Tribe Law Enforcement Services launched the initial investigation, quickly recognizing the gravity of the crime. With tribal jurisdiction complications, the FBI stepped in to assist, building a joint case that led straight to federal charges. The victim never regained consciousness and died at the scene.

Assistant U.S. Attorney Jay Miller prosecuted the case with a focus on the deliberate nature of the act. “This wasn’t a fight,” Miller said in court filings. “It was a choice. He chose to retrieve a weapon and use it lethally.” Evidence showed Big Eagle made no attempt to render aid or call for help after the stabbing.

Immediately after sentencing, Big Eagle was remanded into the custody of the U.S. Marshals Service. His conviction for second-degree murder under federal law underscores the reach of federal jurisdiction in violent crimes on tribal lands. The case remains a grim reminder: in Eagle Butte, a moment of rage can cost a lifetime behind bars.