It is pretty clear what happens to the assets of criminals, especially with regard to crimes against humanity and especially when those assets have value derived from the commitment of those crimes.
Sorta... if you go on a killing spree, are convicted then try to sell your story you are going to have some legal problems & prohibitions.
If however while waiting for arrest/trial end up dead (either at the hands of the police or your own), anyone calling you a 'murder' would be at risk of suit a defamation suit from your estate as you were not actually convicted of that crime.
Perverse perhaps, but it follows from the whole concept of innocent until proven guilty. And while it is commonly accepted that Hitler, Goebbels and OJ Simpsons did some rather horrific things... I'm unaware of any criminal case where the Joseph Goebbels estate would have been denied the normal protections afforded to an unconvinced individual.
I'm not defending the practice, I'm just stating what is.