A burglar enters a house with no signs of forced entry, yet the dogs outside are barking fiercely. How was the intruder unnoticed inside?

Category: Mystery · Difficulty: hard

Hint: Think about how dogs may react even if an intruder is not inside yet.

Answer

Intruder used the unlocked back door

Explanation

The barking could alert to someone's presence outside, but the intruder entered through a door left open or unlocked.

This is a hard mystery riddle — a tricky one that takes a little thought. The answer is Intruder used the unlocked back door.

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