Green and his wife Minnie are buried at San Saba cemetery. There was quite a write up about his murder in Plano in an article written in 2006 http://www.planostar.com/articles/2006/05/16/plano_star-cour...
One of the family trees online has her married to Jesse Stanley Moore, and living in 1920 in Sherman TX. Another tree has her death listed as 1965 in Anadarko, Oklahoma. Her husband also died there about 1949.
I don't find a death at the Collin county level in 1939.
Where does the COX name come from?