Advocate to… to who? Who do you want to do that. Me? You? OP? The police?

They have already compounded a staggering amount of information onto this man who, by all accounts - was simply one of the most boring and bleak men to live. No one has simply “forgotten” or “not thought” to do that. There’s just nothing there.

And what do you mean “posthumous private life”?? The dead do not have private lives. You can interview his ex girlfriends and siblings as much as you want, none of them will suddenly have more info on him.