On June 25, 2015, Kelsie and Savannah Garrigues arrived in Atlanta for a summer visit with their mother, Tiffany Watts, and grandmother, Sandra Anderson. Tiffany and Sandra picked up Kelsie and Savannah at the airport and were headed home to Tennessee. The four of them were stopped in construction traffic on I-75 near Chattanooga, TN, when a tractor-trailer failed to stop in time and collided with eight vehicles. The truck traveled more than the length of a football field from the initial point of impact to its final rest position.
In total, six people were killed, including Tiffany, Kelsie, Savannah, and Sandra, and another six people were injured in what several veteran officers stated was the most horrific crash they had ever seen. This was one of the few surface transportation crashes that the National Transportation Safety Board (NTSB) investigated that year.