Authorities have identified the four people found dead in Lake County, Tennessee, as 15-year-old Braydon Williams, 20-year-old Adrianna Williams, 21-year-old James M. Wilson, and 38-year-old Cortney Rose.

All were relatives of a 7-month-old infant found abandoned in a car seat 40 miles away.

The victims included the baby’s parents, grandmother, and uncle.

On July 31, Austin Robert Drummond was charged with four counts of first-degree murder and other felony charges but remains at large, USA Today has reported.

Authorities say the incident appears to be isolated and the investigation is ongoing.

Written by B.C. Begley