It did cut down crime, however this may not have changed the situation on the streets, because the fog that descended onto the East End at night due to its proximity to the river Thames and the smoke coing from factories around the area due to the Industrial Revolution meant that Jack the Ripper could jump in and out of shadows. The fog just added to the poorly lit streets of Whitechapel, which was a great advantage for the Ripper. The police also tried to catch him by committing to door-to-door enquiries. But, many of the things the police would do were futile as they had not ever come across a murderer such as Jack the Ripper before and they did not know how to go about catching a man who was intelligent enough to essentially disect a human body and find somebody's organs yet hide behind a front that showed him to be more of an illiterate than he actually was. Some Ripperologists believe that the killings stopped due to one of these possible factors:
⦁ Jack the Ripper died
⦁ Jack the Ripper moved abroad
⦁ Jack the Ripper was incarcerated
I believe this theory to be correct as serial killers never have nor ever will stop killing willingly for years on end and essentially disappear from the face of the earth.
Generally accepted victims:
⦁ Mary Ann Nichols - 31st August 1888,
⦁ Annie Chapman - 8th September