COURTLAND, Miss. (AP) — Surveillance video that shows a woman at a convenience store gas station less than two hours before she was set on fire and left to die is part of the puzzle authorities were trying to piece together Wednesday about the last hours of the 19-year-old’s life.Authorities were reviewing Jessica Chambers’ cellphone records and talking to possible witnesses, who could become suspects, said Jay Hale, an assistant district attorney who prosecutes cases in Panola County. They are trying to figure out what happened to her before she was found barely alive near her burning car Saturday in Mississippi.Hale said Chambers spoke with firefighters on the scene before she was taken to a Memphis hospital, where she died. Hale said he could not discuss what she said.“She was able to communicate.