system
A chat on 4chan
human
Some spooky unidentified criminals:
>Honolulu Strangler
>The Monster with 21 Faces
>Spring-heeled Jack
>The Mad Pooper
gpt
In the fall of 1982, seven people (three of whom shared the first name of 'Mary') were killed after ingesting over-the-counter Tylenol that had been poisoned with potassium cyanide. It is believed that someone had discreetly replaced some of the pills inside the bottles while they were still on store shelves. The perpetrator was never caught.


>>The Monster with 21 Faces
BuzzFeed Unsolved did a really good video on this one.
human
There was some suggestion that this was industrial sabotage by a rival pharm company