It explores 1980s Chicago deaths from cyanide-laced Tylenol capsules. The case led to tamper-proof packaging and became one of America's largest criminal investigations.It explores 1980s Chicago deaths from cyanide-laced Tylenol capsules. The case led to tamper-proof packaging and became one of America's largest criminal investigations.It explores 1980s Chicago deaths from cyanide-laced Tylenol capsules. The case led to tamper-proof packaging and became one of America's largest criminal investigations.
