Jessica Chambers, the 19-year-old Mississippi teen found burning beside a car on Saturday, was able to identify her attacker to investigators before she died, according to her sister Amanda Prince.

First responders found Chambers still walking while entirely covered in flames along a road in Courtland, Mississippi. She succumbed to her injuries at a hospital where preliminary autopsy reports reveal severe burns over 98 percent of her body, said the Panola County Sheriff's office.

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On Tuesday, Prince said Jessica was able to tell investigators who her attacker was before she died. Panola County Sheriff Dennis Darby said they already have a person of interest in the case and interviews with witnesses are ongoing.

Detectives are examining the victim's cellphone which was left on the scene. A gasoline station surveillance video may also help authorities in shedding light on the ghastly crime. The Mississippi Bureau of Investigation is reportedly helping in the case.

Officers theorized that the victim was still inside the car when she was doused with a flammable liquid down her throat and nose before she was set on fire.

Jessica's father, Ben Chambers, said her daughter had a big gash on top of her head. "When the fire department got there, she was walking down the road on fire ... only part of her body that wasn't burned was the bottom of her feet...She told them, she told them, told him who done it," he said.

Prince said Jessica called their mother early evening on Saturday saying she was going to clean out her car and pick up some things.

The town of Courtland, with a population of 460, was stunned by the incident. "She was so much light. She was definitely put here for a reason," Prince said.

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