Well I have an interesting bit of information I was contacted by the current detective and the dna lab in Texas turns out this guy and I have similar dna. They have traced him to be about my 4th cousin but still no name as of yet. I do not know him nor have I ever seen him with the exception of the morgue photos that were sent to me from the detective he was not disfigured nor was he skeletal remains. Even the burns on his upper chest were not too bad. And his face just showed a couple small entry wounds from the gun shot"The only clues to his identity were three scars around his groin, likely from a vascular surgery, called a "Dacron graft." The surgery was invented in the 1950s but still wasn't common in the late '70s."
Do hospitals keep records for back this far? Just thinking if it is quite an unusual or innovative surgery, that there might still be some sort of records? I realise it's different in the US, there is no "joined up" national health system that might centrally store records anywhere.