Gregory Adams was a husband, father, and the police chief of a small town in Pennsylvania. One day, while out on patrol, he was killed in the line of duty. The suspect in his murder, seemed to disappear off of the face of the Earth for over thirty years, and would have one of the longest runs on the FBI's most wanted list. 

Listen to this episode of Crime Nerds to see how this case was eventually solved and the secrets that came to light after thirty years. 

UPDATE: This episode was previously covered on Crime Nerds. The old episode was deleted and rerecorded with new information.

Resources for this episode include:
Officer Down Memorial Page
Wikipedia 
Pittsburgh Post-Gazette
The Saturday Evening Post