You could call him a rapist, but, as far as I can tell, you couldn't call him "evil", even though the "one evil thing" was very evil.
As I said in another thread, I think we are required to judge deeds but enjoined from judging people.
I've never understood that argument; how can you NOT like something somebody has done and STILL like the person? The person makes a conscious choice to do the deed; unless you just don't want to make people accountable for their own actions, that sounds like a cop out to me.