Re: Joseph Leroy Moon
You might want to check with the City of Courpus Christi's Administrative Offices. I am a retired Police Detective in Michigan, My paid retirement, passed on to my wife at my death required me to list my life insurance company and who receives my benifits. I don't know what city you are in but possibly Mr. Moon's department might have historical data files on K.I.A. officers. Good luck, I know how important the work you are doing is for the memorial and possibly the family. "Behind the Badge".
A few years back I was able to travel to the Washington D.C. Police Officer's Memorial program, and it was very moving.
Let me know if you need any other of MY ideas...