Walker has been in custody since her child, Aniston Walker, was reported missing Jan. 9 by the baby's father. Police said Walker told investigators she left the baby with her 3-year-old brother in their home, and when she returned, Aniston was gone.
The girl's body was found by a motorcyclist in a ditch near a road in Millington on Feb. 16.
An indictment says Walker has been charged with first-degree murder in the perpetration of aggravated child abuse, neglect or endangerment. She also has been charged with aggravated child abuse and abuse of a corpse.