I was personally hoping for more direct evidence. Considering the amount of time that have passed since the murder, my thought was always that the most likely e

I was personally hoping for more direct evidence. Considering the amount of time that have passed since the murder, my thought was always that the most likely evidence to ever surface was some intelligence records from old South African or Soviet archives. After almost 35 years it would be next to impossible to find some gunman working alone guilty of it in court, even if he admitted to it. I'm guessing there's very little non-public info he could divulge to prove he was there or any physical evidence he could provide to prove his own guilt. The best (and perhaps only) bet for physical evidence would probably be bullets with the same led isotope composition, and a plausible gun...