@Walter Hinteler,
Yes I know, Walter, but I live in the U.S. now and that made me cold and bitter towards criminals. Some of the most unspeakable crimes happen here and it's safe to say that the majority of criminals in prison never rehabilitate themselves.
There are exceptions, as aidan points out and her working in a prison, I do believe her, however, as long as they're imprisoned i.e. punished for a crime, they should not receive the privilege to vote. Once they have become a valuable part of society again, yes - until then, no!