Quoting a post from another part of the forum:
I had never considered this before. Is it possible that the murders stopped because Jack succumbed - either to disability or death - to an illness borne from his rummaging inside the dirty - and likely disease ridden - interiors of his victims? If he was not a professional man, is it possible he might not even have worn gloves when committing his acts?
Rummaging around inside a dead body is not the healthiest of pursuits. There are all sorts of microbes waiting, especially since these ladies did not have the healthiest of lifestyles. If he even nicked himself during the struggle they would have had a point of entry. The normal human intestine is full of EColi where it usually does not cause trouble. But EColi can cause a lot of trouble elsewhere in the human body. He cut open Kate's intestines and handled them. He could have spent October being very very sick.
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