RAPID CITY, S.D. (AP) — A Pine Ridge Reservation woman accused of killing her 2-year-old son has pleaded not guilty to murder and child abuse.

Federal authorities say the son of 28-year-old Katrina Shangreaux had bruises and bite marks on his body and other injuries. Investigators believe a potty-training issue triggered the alleged incident in late July.

U.S. Magistrate Judge Daneta Wollman on Wednesday ordered Shangreaux to be detained until trial, which is scheduled to begin Oct. 11 in federal court in Rapid City. Shangreaux could face life in prison if convicted.

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. James Shangreaux has pleaded not guilty to murder and child abuse counts and is to stand trial in January.

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