The arrested woman, who was identified as Breanna Gayle Runions, claimed the incident happened when she was trying to demonstrate gun safety.

In a statement released, the Tennessee Bureau of Investigation (TBI) said: "Special agents from the Tennessee Bureau of Investigation, working alongside investigators from the Rockwood Police Department, have arrested and charged a woman in connection to the shooting death of a four-year-old girl."

"At the request of 9th Judicial District Attorney General Russell Johnson, TBI agents joined the investigation into the death of Evangeline Gunter shortly after it occurred Sunday at a home in the 100 block of Airport Road," read the statement.

Authorities arrested Runions and charged her with one count of First-Degree Felony Murder and one count of Aggravated Child Abuse.

She remained in the custody of the Roane County Jail on USD 1.5 million bond.