A former Sequoyah County resident charged with firstdegree murder in tribal court has now been sentenced to 60 years in prison after pleading guilty in federal court in April to the brutal killing of her mother.

Tracy A. Mannon, 53, also known as Tracy A. Moore, entered a guilty plea in U.S. District Court to one count of murder in Indian Country – second degree in connection with the Feb. 26, 2024, stabbing death of her mother, Linda Barnes.

The crime occurred in Latimer County, within the boundaries of the Choctaw Nation Reservation, and was investigated by the FBI, Oklahoma State Bureau of Investigation, and Wilburton Police Department.

The federal case followed an initial murder charge filed by the Choctaw Nation District Court, under which Mannon was held on a $1 million bond.

According to a federal probable cause affidavit, Wilburton Police responded to a 911 call from a neighbor who reported hearing screams coming from a residence on W. Caddo Ave.

When officers arrived, they found the lifeless body of 68-year-old Barnes, who had suffered multiple stab and slash wounds to her chest, stomach, face and arms.

Police found Mannon at the kitchen sink, reportedly washing dishes. Nearby, they discovered a blood-stained knife, and Mannon admitted to using two knives during the attack. She also confessed to planning to dismember her mother’s body but said the knife she intended to use was too dull. Blood remained under her fingernails despite her claim that she had been in the shower.

Investigators say Mannon attempted to clean the crime scene before authorities arrived.

Witnesses told police they heard Barnes pleading with Mannon not to hurt her. One witness saw Mannon discard a robe in the backyard and return with a large blue container.

Mannon later admitted to pushing her mother out the back door and stabbing her multiple times until she died.