I echo through the night but leave no trace; I can send chills or alert you. What could I be?

Category: Mystery · Difficulty: hard

Hint: Consider sounds that can invoke fear or urgency.

Answer

A sudden scream

Explanation

A sudden scream can signify danger or distress, alerting nearby individuals to a possible crime.

This is a hard mystery riddle — a tricky one that takes a little thought. The answer is A sudden scream.

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