Originally Posted by Fisherman
I have an idea why Mary Kelly was killed. I also have an idea why Annie Chapman was killed.
Oddly, they both had their abdominal walls completely cut away in 3 (Kelly) and 4 (Chapman) large pieces of skin with subcutaneous tissue attaching. To me, this puts it well beyond doubt that they had the same killer.
I know that I have mentioned this before, but it very much belongs to the picture - extremely rare damage like this is exactly how we can tie victims together.
Liz was not cut open as her condition was hereditary and of little interest to Jack.