A Tragic Case of Mistaken Identity

For six grueling days, Abby Guerra's family believed the 19-year-old, pictured right, had died in a car crash in Arizona. Instead, it was her best friend, 21-year-old, Marlena Cantu, left.

Hospital: Severe Injuries Led to ID Mistake
Mourning the Wrong Girl
Family Questions How Hospital Mix-Up Happened

Credit: CBS