Thanks, though I was referring more to the possibility of the Ripper being a copper. Personally I don't think he was, and if policemen carried lanterns that would make it less likely; that plus the fact that his uniform would be covered in blood and gore.Yes, off hand one of the policemen who came down a ginnel of Mitre Square had a lamp, but he didn't see anything as it obviously only carried light to a short distance. There's a decent chance his lamp missed the murder or the body after the murder.
Personally I think the actual killer was likely none of those mentioned; just an ordinary punter with a fascination for the female anatomy who decided to carry out his sick fantasies. When he had done pretty much everything he needed to do with his last victim he had nowhere further to go and so wemt back to his ordinary life. I also find it hard to believe that the message on the wall had anything to do with the Ripper.