Two American teens jailed in Rome, accused of killing an Italian policeman. Finnegan Lee Elder, 19, and Gabriel Christian Natale-Hjorth, 18 were approached by the plain clothes officers after they tried to extort money and cocaine from a drug dealer. Deputy Brigadier Mario Cerciello Rega, 35, a newlywed, was stabbed 11 times. Joining Nancy Grace to discuss the case, Psychiatrist Dr Daniel Bober, Forensics Expert Joseph Scott Morgan. Retired Chief Medical Examiner for the State of Georgia Dr Kris Sperry and Crime Stories reporter Dave Mack.