This is... interesting.
https://www.the-independent.com/news/world/americas/crime/idaho-cold-case-boise-church-tylenol-murders-b3055315.html
Idaho cops finally identify a dead man who was found beneath a church pew in 1982 - and after doing a bit of research think he might have links to the unsolved 'Tylenol' murders - the reason everything has tamper-proof caps now.
I vividly remember the murders and the spate of utter terror right after.
Of course, they haven't proven anything, but I'm guessing it will be investigated thoroughly by someone.