“So where this leaves us is: While our office may have identified some possible connection between Dr. Betkouski and the 1982 events, we're not naming him as a suspect and we cannot say he was in Chicago in the final week of September 1982”

NBC News · Sep 22 · Idaho detectives tie dead 'Unknown Wanderer' to 1982 Tylenol murders; Chicago skeptical

“This was sodium cyanide. This was not potassium cyanide, as was used in the Chicago-area deaths in 1982.”

NBC News · Sep 22 · Idaho detectives tie dead 'Unknown Wanderer' to 1982 Tylenol murders; Chicago skeptical