Gean Carlos Gomes, director of the facility, claims he spotted the drug peddling mouse running through a prison corridor with drugs tied to its tail.
Further investigation uncovered 29 small packets of marijuana and 23 packets of cocaine, and guards have released video footage of the guilty mouse in question.
Police are now reportedly reviewing CCTV footage in an effort to find out who was the mastermind behind the madcap scheme and who trained the mouse.
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