What Ever Happened to Mary Day?

A 13-year-old girl vanishes in 1981. Detectives believe she was murdered. Years later, a woman appears and claims to be the missing girl. Is she an impostor? "48 Hours" correspondent Maureen Maher reports.       

What Ever Happened to Mary Day?
A 13-year-old girl vanishes in 1981. Detectives believe she was murdered. Years later, a woman appears and claims to be the missing girl. Is she an impostor? "48 Hours" correspondent Maureen Maher reports.