The Untold Truth Of Twilight's Alice Cullen

When little Alice began having visions of her mother dying, she begged her mother to stay home. Alice's mother agreed, but her father disapproved of the child's behavior. Time passed and her mother eventually let her guard down. It wasn't long before she was murdered, though her death was ruled an accident. As a result of her visions, Alice knew better, but was threatened by her father into silence. 

Her father quickly remarried, and young Alice had another vision, this time of her father and her new stepmother paying off a stranger to kill her mother. Alice ran and sought refuge with relatives, but they, like many of the people in her town, feared her and blamed her visions for the death of others. With nowhere to go, Alice tried to explain to the police what she saw, but her father caught up with her and threw her into a mental asylum.

At the asylum, Alice was subjected to electroshock treatments. The painful treatment erased her memory of her recent past, and she reverted to a cheerful, easygoing person... or so it seemed. She began having visions of a tracker, a type of vampire that prefers to hunt humans over an extended period, based on their scent. In her visions, Alice saw this tracker, James, kill her and a vampire friend she'd met while committed. The mysterious vampire decided to turn Alice, left her in hiding, and distract James at all costs. Alice completed her transformation, but the one who changed her never returned, presumably killed by the tracker.