The boy has yet to be identified, according to The Atlanta Journal-Constitution.
Breyanla Cooper, 27, was taken into custody late July 1, more than 12 hours after Cobb firefighters spotted the boy’s body during a training exercise on the river.
The Cobb County fire crew was “beginning training and filming a water safety video when they discovered the remains of the toddler, Cobb police spokesman Sgt. Wayne Delk told The Atlanta Journal-Constitution.
Police released a sketch of the victim in hopes that the public can help identify him.
Police have not released the nature of the relationship between Cooper and the toddler, but the arrest warrant says that the case was domestic violence, The Atlanta Journal-Constitution reported.
The boy’s exact age is not known, but investigators believe he was likely between 18 months and 3 years old.
His body may have been in the river for five days before the remains were discovered, according to an arrest warrant.
The toddler’s body has been turned over to the Cobb County Medical Examiner’s Office as authorities work to determine the exact cause and manner of death, The Atlanta Journal-Constitution reported.
Cooper’s arrest was the result of several tips received from the public, according to Delk.
Cooper is accused of hindering the investigators’ ability to determine if the death involved foul play.
Cooper has been charged with concealing the death of another, according to The Atlanta Journal-Constitution. Cooper is being held at the Cobb County Jail without bond.