Kennedy Rose Aigner of Shepherd admitted Wednesday to shooting and killing Quaid Fluckiger.
Aigner, 23 years old, appeared before Judge Jessica Fehr in Yellowstone County District Court and pleaded guilty to a charge of deliberate homicide for the Februry 28, 2024 death of Fluckiger.
A plea agreement states prosecutors will recommend a prison term of 55 years at a sentencing hearing to be set at a later date.
A second felony charge of tampering with evidence will be dismissed and prosecutors will also not seek a weapons enhancement as part of the agreement.
In court, Aigner admitted that she shot Fluckinger in the head with a .22-caliber pistol inside a residence on Chicago Road.
Aigner was arrested shortly after deputies responded to a report of an overdose and found the 24-year-old man at the residence and unresponsive.
Deputies attempted to revive Fluckiger with CPR, Narcan, and other procedures but he was later pronounced dead at a hospital.
Fluckiger's death was later determined to be the result of a gunshot wound to the head.
Aigner allegedly admitted to shooting Fluckiger during an argument, and authorities said the firearm used in the shooting was hidden in a garage.
Aigner and Fluckiger lived at the Shepherd residence with their 4-year-old child.
