

But his intention was that his wife would be the only one to die. His answer was to construct an elaborate scheme to make it appear as though a fictional poisoner had maliciously spiked several bottles of tonic water. Her unexpected death would eventually be explained as atropine poisoning, so he also needed someone else to blame. He thought he could mask this by adding it to the already bitter tonic his wife had with her gin. Agutter knew atropine had a major drawback as a murder weapon: it has a very bitter taste, detectable at concentrations as low as 100 parts per million (0.001 per cent).
