#cyanide poisoning

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#ada county sheriff #boise #cold case #mathew betkouski #tylenol murderer #tylenol murders #unsolved mysteries

Boise Cops Solve Tylenol Murderer Identity
Boise police identify Dr. Mathew Betkouski as 'The Unknown Wanderer' linked to 1982 Tylenol poisonings.
The Hollywood Reporter · 1m