A 22-year-old Florida mother allegedly found her 14-month-old toddler submerged in water after leaving the child and her 3-year-old sister alone in the bathtub "for a few minutes."
Emergency crews started CPR on the child at the Fernandina Beach home on Tuesday afternoon, but she was declared dead a short time later at a hospital.
Nassau County Sheriff Bill Leeper told reporters that the death was "totally preventable."
The 3-year-old wasn't injured.
The Florida Department of Children and Families is investigating and the older child is being taken care of by her grandmother.