Three seemingly unrelated deaths proved to be serial murders. The killer had been careful – he used poison which had no taste or odor. Fortunately for investigators, it also had a unique chemical signature.
Genres: Crime , Documentary
Keywords: coroner , criminal-investigation , evidence , forensic-science , forensic-technology , interview , law-enforcement , medical-examiner , reenactment , suspicion-of-murder , true-crime , whodunit