Tylenol murders: daughter tells of toll of unsolved killings, 40 years on

Forty years after the infamous Tylenol murders killed her father and two other close relatives, a Wisconsin woman refuses to take the popular pain pills.

Kasia Janus also always verifies products are properly sealed before she buys anything at stores, she said in a recently published series of interviews with CNN that described the gut-wrenching legacy left behind for her by the unsolved Tylenol killings, which made tampering with medications as well as other consumer goods a federal crime but remain unsolved.

Manufacturer Johnson & Johnson recalled 31 million Tylenol bottles as panic spread nationwide. Congress eventually criminalized tampering with medications and other consumer products, classifying that as a federal crime that could carry up to life imprisonment in cases involving a death.

And soon, many medications and foods sold over store counters began being sold in tamper-proof, sealed packaging.

But the police chief of the Chicago suburb where Adam Janus lived, Joe Murphy, told CNN he hopes forensic technology used to analyze DNA could eventually produce the break they need to conclusively identify whoever was responsible for the Tylenol killings.