Did she get hit by a car who didnt see her in her dark clothes? Did they panic and put her in the car and deposited the body else where? Did that person seek help from a close friend or family member? They could have been under the influence. Someone out there knows the truth! She didnt have a bag to run away and she would also need a reason, a reason that no one has explained!
That's a great theory that I hadn't yet thought of! Somebody out there must know something.