Marion officials have identified a toddler who died while in the care of her mother’s boyfriend and was discovered Wednesday. Arianna Carmack, 2, suffered a “flash burn” from an unidentified chemical, according to a coroner’s report Thursday. While flash burn injuries are considered non-life threatening, officials believe the burns contributed to her death. Arianna sustained injuries to her head, chest and back. She also had multiple bruises on her lower extremities, the coroner said, but they appeared to be in the healing stages. The boyfriend, 27-year-old Donald Riddle, was taken into custody Thursday and has been charged with neglect of a dependent resulting in death.