Authorities have shared few other details about the case that shocked the town of about 500 people. It's not clear how any of the defendants are connected to the children. Authorities haven't released any details about what caused their deaths, and affidavits in the case have been closed to public view.
Two men and a third woman face other charges in the girls' deaths.
Frederick Blair, a 23-year-old man from Norwood, Ika Eden, a 53-year-old woman from Jamaica, and Ashford Archer, a 50-year-old man from Haiti, are charged with fatal child abuse.
Blair and Archer also have been charged with acting as an accessory to a crime.