What do you call a reptile that can solve crimes?

Investigator

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Not to be confused with an investodile

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The alligator only ever makes allegations

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Allegories.................

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What do you call a vegetable that can solve crimes?

Celery Queen.

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See you later agitator investigator

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Does he snake around the crime scene?

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true, allegedlatorly

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Sure, but the investigator comes into the picture only after the alligator makes a complaint.