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Detective riddle

Inspector Brooks investigated a break-in at a high-tech laboratory. The thief bypassed the biometric retinal scanner by using a high-resolution photograph of the scientist's eye. Brooks noticed one fatal flaw in the thief's setup that proved an insider helped them. What was it about the photograph?

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

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