‘If the wife was indeed the murderer, there would be at least three hurdles for her to clear,’ Yukawa said, holding up three fingers. ‘One, no one must notice or have reason to believe that the poison had been placed before it was ingested. Otherwise, there’d be no point in constructing an alibi. Two, she would have to be sure that it was Mr Mashiba who took the poison. She might not mind getting the lover, too, as collateral damage, but she would have to be sure to also get her mark. Third, the whole plan would have to be something easily prepared in a short amount of time. There was a dinner
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