Tina Sheldon of Pasco County, whose 5-year-old son died after the car she was driving struck a pole Friday, remained in critical but stable condition Sunday at Tampa General Hospital. A spokeswoman said Sheldon, 32, was still in the hospital's intensive care unit. Her son, Justin, died after the accident at McKethan and Ranch roads near Ridge Manor, according to the Florida Highway Patrol. The crash remains under investigation. Circumstances surrounding the accident are still unclear. Sheldon was driving a 1986 Nissan north on McKethan when she apparently ran onto the shoulder and struck a fence and power pole, an FHP report said.