NOW I have to think of the surviving family this person left behind--- they have suffered terrible untimely bereavements in the last couple of years, like the OLA families. Having had a few of those myself, it makes me sorry for my damnable curiosity and wanting to protect them.
Whatever their progenitor did or did not do (and I still need more proof it WAS him), and even whether or not they knew about it, THEY do NOT deserve to suffer for it, in the event somebody is tempted to contact them. IF you use the same clues and come to the same conclusion, PLEASE DO NOT CONTACT THEM!!!!! EVER!!!!!! (I cannot stress this enough!)
HE has long been beyond the world's judgment, alas. Sometimes the bad guy gets away with it, AND leaves blameless descendants in his wake.
I am now in a moral quandary. A quagmire, actually.