Poplar man sentenced to prison for assault on the Fort Peck Indian Reservation

GREAT FALLS – A Poplar man who assaulted a female on the Fort Peck Indian Reservation was sentenced today to 23 months in prison, followed by 3 years of supervised release, U.S. Attorney Kurt Alme said.

Lawrence George Fast Horse, 35, pleaded guilty in September 2025 to one count of domestic assault by a habitual offender.

Chief U.S. District Judge Brian M. Morris presided.

The government alleged in court documents that on August 2, 2024, Lawrence George Fast Horse stabbed Jane Doe in Poplar. Responding officers observed a stab wound on Jane Doe’s upper back. An officer searched Fast Horse at the scene and located a knife with brass knuckles attached to it in his right-side shorts pocket.

A witness told law enforcement Fast Horse and Jane Doe were arguing. She saw Fast Horse push Jane Doe from behind and then noticed him attempt to conceal a blade behind his back.

Jane Doe was treated for three stab wounds and was admitted to the hospital for overnight observation.

Fast Horse has been convicted of several prior domestic assaults, including on June 20, 2008, May 23, 2009, January 27, 2013, October 21, 2019, and October 26, 2020.

The U.S. Attorney’s Office prosecuted the case. The FBI and Fort Peck Tribes Department of Law and Justice conducted the investigation.

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