RAPID CITY, S.D. — The grandmother of a 2-year-old boy who authorities say was killed by his mother on the Pine Ridge Reservation has pleaded not guilty to hindering the investigation.

Forty-seven-year-old Sonya Dubray is accused of altering or destroying evidence and giving false and misleading information to investigators. She was arrested Monday and appeared in federal court Wednesday.

Dubray could face up to 43 years in prison if convicted of charges including accessory to murder and tampering with evidence.

Dubray’s daughter is 28-year-old Katrina Shangreaux, who has pleaded not guilty to murder and child abuse in her son’s late-July death. Authorities allege the boy was killed over potty-training issues.

The boy was the half-brother of a 1-year-old boy who authorities say was slain in April 2015 by the father of the two boys.

VIAThe Associated Press
The AP is one of the largest and most trusted sources of independent newsgathering. AP is neither privately owned nor government-funded; instead, as a not-for-profit news cooperative owned by its American newspaper and broadcast members, it can maintain its single-minded focus on newsgathering and its commitment to the highest standards of objective, accurate journalism.