Lame Deer resident Waylon Dean Sioux, 36, denied federal charges that he kidnapped a person and threatened to shoot another person earlier this year.
Appearing for arraignment Wednesday in U.S. District Court in Billings, Sioux pleaded not guilty to assault with a dangerous weapon and kidnapping near Lame Deer on Feb. 22.
The indictment said Sioux aimed a rifle at a person identified by the initials C.L.M. and threatened to shoot. He also "unlawfully seized and confined" a person identified as T.W.B., the document said.
If convicted, Sioux faces up to life in prison and a maximum $250,000 fine on the kidnapping charge and a maximum of 10 years in prison and a maximum $250,000 fine on the assault.
U.S. Magistrate Judge Carolyn Ostby ordered Sioux to remain in custody. The case will be heard by Chief U.S. District Judge Richard Cebull.