darth_ender said:
@Boost, now I can't help but wonder if you're cheating by looking them up. That said, I believe there is at least one other prominent serial killer (I'd have to look up who, since I've forgotten) who is Mormon. Another infamous example is Butch Cassidy.
JEDIT: Now I know you're not cheating because I tried to look up Shelton Young and can't find anything. Are you making that one up?
You caught me. ;-)