Dallas Wayne Thundershield, Second-Degree Murder, North Dakota, 2016

Dallas Wayne Thundershield, 36, of Fort Totten, North Dakota, was convicted of second-degree murder following a six-day federal trial that laid bare a brutal rampage across the Spirit Lake Reservation. The jury returned a guilty verdict on October 26, 2016, on all four counts: 2nd Degree Murder, Assault with Intent to Commit Murder, Assault with a Dangerous Weapon, and Assault Resulting in Substantial Bodily Injury.

The violence erupted on April 9, 2016, when Thundershield and Priscilla Bear accepted a ride from Elvis and Richard Demarce in exchange for gas money. What started as a casual drive turned deadly when Thundershield, seated behind Bear in the pickup, began poking her with a knife and striking her. Ordered to stop, Elvis Demarce told Bear to pull over. The moment he stepped out, Thundershield attacked, stabbing Elvis multiple times and leaving him bleeding in a roadside ditch along BIA-6.

Richard Demarce tried to intervene, but Thundershield turned on him with lethal force. After fleeing the scene with Bear, Thundershield made a deliberate U-turn, returning to finish what he started. He jumped from the stolen pickup, charged at Richard, and plunged a knife into his chest—piercing his heart. Richard Demarce died at the scene. Thundershield left both men behind, one near death, the other already dead.

Thundershield then drove Elvis Demarce’s pickup to a residence near Hamar, North Dakota, where he stayed. In the early hours of April 10, he assaulted Priscilla Bear again, inflicting substantial bodily injury. She managed to get help. Law enforcement arrived and arrested Thundershield without resistance. The knife, the vehicle, and witness testimony sealed his fate.

The investigation was a joint effort by the Federal Bureau of Investigation, the Bureau of Indian Affairs–Fort Totten, and the North Dakota Bureau of Criminal Investigation. Federal jurisdiction stemmed from the crime occurring on tribal land, elevating the case to the U.S. Attorney’s Office for North Dakota. Prosecutors presented a relentless case built on eyewitness accounts, forensic evidence, and Thundershield’s own movements captured on the night’s timeline.

Assistant U.S. Attorneys Janice Morley and Matthew Greenley led the prosecution. U.S. District Judge Ralph R. Erickson presided over the trial and scheduled sentencing for January 24, 2017, at 1:30 PM in U.S. District Court, Fargo. Thundershield faces life in federal prison for the murder and decades more for the assaults—justice served, but blood already spilled on the gravel roads of the reservation.