I can recommend the book about the search for Richard
III's grave. FASkinatin' !!

No one claimed that he personally did the nephews in;
he was not even in the area at the time the "murder"
was thought to have happened. Did he arrange for the
murderer to do it? That's another question.

Actually, there was no real reason to believe that
they were even dead. They were missing from the Tower, which
was the Royal residence at the time, where they had been kept.
It was only after quite a number of years that the accusatory
finger was pointed at him.

Dave Oesterreich