Originally Posted by Sam Flynn
It looks to me like her killer just "lost it" and went berserk with the knife, without really knowing what he was doing until it was over.
I agree with this. Although, the killer clearly had issues to begin with, and after getting away with it, and having 3 weeks to contemplate, I can see how the murderer of Polly Nichols was formed.
Sutcliffe started off with a brick in a sock.