More than three decades after she vanished, a missing Arizona teen has been found alive and well, authorities said. Christina Marie Plante was first reported missing in May 1994 when she was just 13 years old. "Investigators have confirmed her identity, and her status as a missing person has been officially resolved," the Gila County Sheriff's Office said in a statement via Facebook on Wednesday, April 1. Authorities said that Plante disappeared from Star Valley without a trace.