Marlena Murray, 29, was indicted on criminal negligent homicide charges after her 2-year-old son, Josiah Meadors, drowned in a pond near their home in May.
The men were believed to have been dismembered before being dumped in the river, according to the police, who claimed the river looked like a landfill.
Dr. Janaki Earla, 59, was arrested after the victim's mother reported his sexual advances towards her daughter to investigators, who later assumed her identity, leading to his arrest.