Prosecutors say Dunn drove drunk and into on-coming traffic on the Spirit Lake Indian Reservation before striking another vehicle.
A North Dakota man has pleaded guilty to driving drunk and killing another man.
U.S. Attorney Timothy Purdon announced Wednesday that 36-year-old Louis John Dunn, of Fort Totten, pleaded guilty to a charge of involuntary manslaughter.
Prosecutors say Dunn drove drunk and into on-coming traffic on the Spirit Lake Indian Reservation before striking another vehicle. The driver of that car, Andrew Greywater, died from his injuries.
The charge carries a maximum penalty of eight years in prison.
Sentencing is set for May 29.