In a crowded room, a detective hears a heartbeat. Everyone insists there’s no one hiding. What’s the detective’s realization?

Category: Mystery · Difficulty: expert

Hint: Think about modern technology.

Answer

The heartbeat is coming from a hidden device.

Explanation

Devices can emit sounds that mimic a heartbeat, leading to confusion in a crowded area.

This is a expert mystery riddle — one of the harder riddles here. The answer is The heartbeat is coming from a hidden device..

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