There are as many suspects in this murder as there are in the “Jack The Ripper “ murders. It’s about as gruesome too. The absolute truth beyond a reasonable doubt for either case after all these years seems pretty unrealistic. I have my opinion and my thoughts on motive, but it’s still a guess.
That poor woman. I cannot imagine being in her position, knowing that the kind of suffering she must have endured while knowing they were her final moments. I don’t recall it being mentioned, but I’d hazard she was sexually assaulted in one way or another.
That aside, there is a theory that H.H. Holmes is Jack. It is admittedly convincing - he killed many here in Chicago, and was in London at the same times the Ripper murders occurred. He made two separate trips, if I recall. He had anatomical knowlege and some training, and was an obvious sadist.
If it wasn’t him, I wouldn’t doubt that he was at least affiliated with Jack.