Meagen Smith and her year-old sister Breanna Garner were returned to their parents Saturday morning after they were missing for more than 12 hours.
Amber McBride, a Tennessee Wildlife Resource Agency volunteer, spotted a car on the side of the road in rural Dyer County Saturday morning.
There were two young girls and an adult woman in the car that matched the description given by the Amber Alert.
McBride called 911 and the Dyer County Sheriff's Department apprehended Erika Sadowski and returned the children to their parents.
The girls were found unharmed. Sadowski is in the custody of Dyersburg Youth Guidance investigators.