The top two suspects spent their lives after prison very differently. But it wouldn’t be long before both were caught up in the Tylenol murders investigation again. This time, one was dead. And one was still alive. During an undercover operation, the FBI hoped one suspect would incriminate himself.

For exclusive details about the Tylenol Murders and a transcript of this episode, visit www.chicagotribune.com/tylenolmurders.