I am from this area and am familiar with this case - he was found hanging in a tobacco barn. There are alot of Hispanics who travel to this area for farm work and not all are legal. With that said, the name in the pocket could very well be the name he was using and not his real name. The Hispanics were very migratory in Hopkinsville during this time - they stayed while the work was plentiful then moved on to another area until the next season's crops were planted. Many of the farmers were not very diligent about work authorization so I would assume that many of the workers were not legal and using someone else's identity.
I know that does not give you much to work with but I wanted you to realize how difficult it would be to ID a Hispanic farmworker considering that there is a very good chance that he was not working legally and any friends of his would be unlikely to point out his real name if it would mean exposing thier deception (I work with a large hispanic population and am used to how private they are - especially if they are using someone else's documents).