In 1982, terror struck the Chicago area when seven people were killed by Tylenol capsules that had been laced with potassium cyanide, a case that to this day remains frustratingly unsolved. This episode covers every aspect of this case, from descriptions of the horrible September day when healthy people started to drop dead out of nowhere, to a full deep dive into the most widely-considered suspects. Finally, we'll get some information as to how this case produced long-term consequences that surround us today as consumers of OTC products. This is a fascinating case and investigation, so grab yourself a fresh cup of coffee - I promise, you'll need it for this one!