Did killer use wood chipper & concrete to hide woman’s body?

Does a concrete wall in a Pennsylvania home hold the remains of a woman missing since 1989? Police suspect the killer used a wood chipper to grind up the body, which was then mixed into concrete. Major crimes scene investigator Karen Smith and RadarOnline reporter Alexis Tereszcuk join Nancy Grace to discuss this cold case. Other topics in this episide include a missing North Dakota woman found dead in a river, her body wrapped in plastic and her newborn baby in the arms of another woman; a teen girl who live streamed her sister's car crash death offers unusual reasons for her bizarre behavior.