An Arapahoe woman pleaded guilty in federal court in Casper on Tuesday to one count of assault resulting in serious bodily injury that caused the death of her boyfriend in October.

Yvonne Moss pleaded guilty to the charge before U.S. District Court Judge Scott Skavdahl in a deal worked out with prosecutors and her defense attorney.

Depending on the judge's review of the presentence investigation, she could serve either 34 or 37 months behind bars.

Moss, an enrolled member of the Northern Arapaho Tribe, was arrested after Clarence Tyler was found dead in their residence in Arapahoe on Oct. 11.

Moss's brother, who lived with them, told investigators that his sister and Tyler got along well when they weren't drinking.

But that night, they were drunk and arguing.

Moss's brother heard Tyler falling through a door and saw Moss repeatedly kick him.

An autopsy determined Tyler suffered a massive hemorrhage in the brain and severe bruising.

Moss is scheduled to be sentenced on March 24.