Investigators were called to the home at 427 Myron Hart Road.
Nicole Harnage told investigators she put her 10-month-old son Bradden in the tub with his two year old sister McKenzie.
She turned on the water, but didn't plug the tub.
She says she walked out and the two year old plugged the tub and enough water collected to drown the infant.
He was taken to Colquitt Regional Hospital, but couldn't be revived.
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