In one of the most famous murder stories of all time, Nicole Simpson and Ron Goldman were stabbed to death. The evidence pointed to Nicole's ex-husband O.J. Simpson but the jury found him not guilty. 20 years later, Barbara talks with Kato Kaelin again.

Barbara Walters shares exclusive details about the case of Erik and Lyle Menendez who murdered their parents in 1989, including letters from Erik Menendez and a childhood message that shed new light on the crime.