In April 1990, married couple Nancy Bishop and Richard Langert, who were expecting their first child, were found murdered in their Chicago home. Their killer was identified months later as David Biro, a local high school student, who bragged to a friend that he had done it. Decades later, in seeking closure to the crime, Nancy's sister pursued a face-to-face meeting with Biro in prison. “48 Hours" Correspondent Maureen Maher reports.

This classic "48 Hours" episode last aired on 12/24/2016. Watch all-new episodes of “48 Hours” on Saturdays and stream on demand on Paramount+.