Verna Sawyer Carson is the mother of Loretta Sawyer and the grandmother of Heather Miller and Leatherface in Texas Chainsaw 3D. Verna was portrayed by Marilyn Burns who also played Sally Hardesty in The Texas Chain Saw Massacre.
After her family was killed including her beloved daughter, she started tracking down information the people involved with massacre which she found her daughter's infant daughter, being raised by Gavin and Arlene Miller.
She keeps tabs on her granddaughter until she was older. When Verna became sick, she started writing Heather a letter explaining her bloodline and her inheritance which includes the manison and her cousin Leatherface. She was buried next to her daughter.