Detective Cruz investigated a break-in at a high-tech laboratory. The thief bypassed a retinal scanner by using a dead employee's eye. Cruz checked the security log and realized the alarm should have sounded immediately, but it didn't. Why?
Retinal scanners require live blood flow and blinking
A dead employee's eye cannot trigger a modern retinal scanner because it lacks blood pressure and pupil response, meaning an insider with a valid code must have bypassed it.
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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