Woman to plead guilty to killing son in argument over potty training

A woman intends to plead guilty to beating her toddler son to death after getting mad at him for wetting his bed.

Katrina Pauline Shangreaux, 30, of Porcupine, would plead guilty to second-degree murder in the death of 2-year-old Kylen Shangreaux in July 2016, according to her plea agreement with federal prosecutors. The crime is punishable by up to life in prison.

In a written statement, Shangreaux admitted assaulting her son when she came home to find he had wet his bed and believed he was behaving defiantly. She hit the child multiple times, including with a belt, threw him to the ground and kicked him in the abdomen and head, bit him several times and injured his privates, the document stated.

Shangreaux said her anger toward the boy mounted when he “gave her a sideways look” and also called her “Angie,” the name of his paternal aunt. Kylen had lived with his aunt for over a year until his mother got him back in June 2016 following a custody battle in Oglala Sioux tribal court.

Shangreaux drank a lot of alcohol and took pain medication just before the fatal attack, according to the statement she signed March 20. She stopped beating the child only when “she saw that he appeared different and realized how badly she had injured him.”

At one point, it said, Shangreaux and her mother, Sonya Dubray, tried to get Kylen to drink apple juice at the kitchen table when he fell to the ground and soiled himself. The women cleaned the blood and feces off the boy before calling for help, as well as cleaned up the scene.

An ambulance took Kylen to the Pine Ridge hospital, where he was pronounced dead around 8:30 a.m. July 28. The physician who treated him believed he had been dead for about four hours. After learning of his death, Shangreaux fled to White Clay, Neb., then to Rapid City.

An autopsy found Kylen died of blunt trauma. The doctor who conducted the autopsy, Donald Habbe, said bruises covered approximately 70 percent of his body. Habbe said these likely contributed to the toddler’s death, because the blood pooling at the bruises may have deprived his organs of sufficient blood.

The doctor also found “extensive bleeding” in Kylen’s abdomen and brain, as well as a rib fracture.

Shangreaux was originally charged with first-degree murder, felony child abuse (aggravated battery of an infant) and felony child abuse and neglect. These charges would be dismissed as part of her plea deal with the U.S. Attorney’s Office.

Dubray was charged also with multiple federal offenses in her grandson’s death, including tampering with evidence and accessory to first-degree murder. Her criminal case is proceeding while she is out of jail on bond.

Shangreaux, also known as Katrina White Whirlwind, is detained at the Pennington County Jail. The schedule of her plea-change hearing is pending.

Kylen’s father is serving time in federal prison for abuse and neglect of a son with a different woman.