Look, my entire family is made up of junkies and drunks, with the exception of my mother, who was a bartender. I am telling you that cocaine and heroin were not prominent or popular in Sumter, SC in 1976! Yes, it was intercepted, but it wasn't the intended final destination. This just wasn't a drug deal gone bad. Could it have been caused by criminal and/or drug activity that occurred elsewhere? Absolutely, that's a big possibility, but you don't get shot three times at close range for a drug burn. I think he was young to be a draft dodger. I also think that the dental records are the key here. I think the reason no-one is because the person\s who performed the dental procedures were in the couple's country of origin and never learned of the case.