Originally Posted by etenguy
This is just a what if, but what if the apron wasn't left at Goulston street by the murderer, but someone who knew where the murderer lived. Perhaps they were scared to come forward and so left the apron there after picking it up when it had been discarded earlier and after following him home. Maybe they witnessed the murder, or its aftermath. Possibly they even left the GSG as a clue to the police. Do we have the Ripper's address?
Not a theory - just a thought game.
IMHO the ripper got pissed because he was interrupted by Jews that night, and being a local who knew the buildings were mostly Jewish residents, left the apron and signed it with the Jew incriminating graffiti.