HAs anyone ever considered the possibility that Inspector Abberline himself was Jack? Sounds silly, I know but it seems to me that although we don't have any confirmed photographs of the man, the sketches of his likeness and composites sort of resemble the man described as the possible Ripper by the witnesses who may have gotten a glimpse of the killer. Aside from that, the man had an intimate knowledge of Whitechapel and it's locals, since he was there for 14 years. So, he would know all the routes and escape passages to avoid being detected. And, what better way to cast suspicion off yourself than by being th lead detective in charge of the on-the-ground manhunt for...yourself.