police? investigate? NEVER!
The police were horrible, plain and simple. They did a crap shoot job of finding witnesses, they dismissed evidence, and how do we know they actually identified the victims correctly?!
To find out more evidence or witnesses they should have shut down everything and gone door to door inquiring. They should have closed down the entire Whitechappel area, not allowed any businesses to open, and made everyone stay in their houses. They should have gotten the military involved. We all know that their police task force was extremely small, so involving the military would have at least tripled the task force. And with the military involved, they could have had patrols EVERYWHERE; not just on street corners or just walking around, but every few yards. I believe with just tripling the task force, making better inquiries, having reliable witnesses (some of the people who identified the victims were very unreliable people, so how do we know if the victims are who everyone says they are?), and shutting down everything could have increased the chances of the police in catching Jack the Ripper.