See Raphael Golb's account of his trial, at:
and see the material on the trial, background and appeal at:
I think this guy was railroaded. The impersonations or "confessions" were crude, designed to provoke a scandal concerning some pretty serious stuff in the academic context. And they did just that. But the subject matter is too specialized and weird for most of us to really know much about, so we write it off as a crime.
For interesting debates about the case, see: