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The Poison That Left No Body: A Trial Built on Absence
Crime, courts & justice10 min

The Poison That Left No Body: A Trial Built on Absence

In 1849, Scottish doctor John Snow's contemporaries faced a chemistry problem: how do you convict a poisoner when the toxin vanishes from the corpse? The episode follows a real prosecution that hinged entirely on what could not be found, and how forensic toxicology was born in a courtroom. It matters because it shows the birth of the idea that science, not just witnesses, could send someone to the gallows.

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Show notes

Nineteenth century forensic science emerged because natural diseases like cholera mimicked the symptoms of arsenic poisoning.

The eighteen forty-nine trial of Charlotte Harris challenged the legal requirement for physical poison residue.

Friedrich Sertürner revolutionized toxicology in eighteen zero five by isolating morphine from raw opium.

The Marsh test allowed investigators to detect arsenic in bodies buried for fourteen months.

Mathieu Orfila established laboratory authority by using chemical tests to override unreliable eyewitness testimony.

Early forensic standards treated negative chemical findings as inconclusive rather than proof of innocence.

In this episode
  1. 01Intro1 min
  2. 02The Crisis of the Invisible Killer2 min
  3. 03The Scottish Paradox: Regina v. Harris2 min
  4. 04The Tools of Detection3 min
  5. 05The Architects of Forensic Standards2 min
  6. 06Outro1 min
Sources
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The Poison That Left No Body: A Trial Built on Absence — Fylom