In 1981 the Chicago Police are faced with 7 murders in the span of a couple of days. It was eventually found to have been the result of tampering of Tylenol. https://www.goodreads.com/book/show/12951472-the-tylenol-mafia?ref=nav_sb_ss_1_7. https://podcasts.apple.com/us/podcast/stuff-you-should-know/id278981407?i=1000439940634. https://podcasts.apple.com/us/podcast/stuff-you-should-know/id278981407?i=1000440145476. https://www.chicagotribune.com/news/ct-xpm-1998-05-06-9805060125-story.html. https://en.wikipedia.org/wiki/Tylenol_(brand). https://podcasts.apple.com/us/podcast/episode-3-suspects/id1644733486?i=1000581001837. https://podcasts.apple.com/us/podcast/episode-1-steak-flowers-tylenol/id1644733486?i=1000580274174. https://podcasts.apple.com/us/podcast/episode-5-breadcrumbs/id1644733486?i=1000582500969. https://podcasts.apple.com/us/podcast/episode-2-turf-war/id1644733486?i=1000580274286. https://podcasts.apple.com/us/podcast/episode-8-the-powerpoint/id1644733486?i=1000584059845.