It was June 1981 when Raymond Nelson, a father and beloved staffer for U.S. Sen. Claiborne Pell, was found murdered in his Washington, D.C., apartment. Was it a robbery gone wrong, or did someone want him silenced? 12 News reporter Kim Kalunian spoke with his son about what he thinks happened to his father, and also gets answers on where this cold case stands. Watch "Cold Cases: Who Killed Raymond Nelson?" on Monday at 5 p.m. on 12 News. Close Thanks for signing up! Watch for us in your inbox. Subscribe Now Special Coverage & Notices SIGN UP NOW