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Detective riddle

A digital safe was hacked in a corporate office. The IT manager claimed he was locked out of his terminal all evening by a system glitch. The security log showed multiple failed login attempts followed by a successful master override using the CEO's credentials at 3:00 AM. The detective arrested the IT manager immediately. What gave him away?

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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