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Detective riddle

A renowned explorer was found dead inside his locked study. A suicide note lay on his desk, written with a fountain pen. Inspector Dale picked up the note, held it up to the desk lamp, and immediately declared it a forgery. The note stated the explorer was depressed about losing his eyesight in his left eye. What proved Dale right?

About this riddle

Detective riddles are tiny mysteries. Look for the detail in the story that does not fit; it is usually the clue that solves the case.

Difficulty: Medium. More like this: Detective riddles with answers or try Truth & Lie Island for a different kind of puzzle.

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