As in, this rodent,

Brazilian prison inmates using a mouse to courier drugs. Inmates in a Brazilian jail have found an unusual way of transporting drugs

“They attached a hook to the mouse’s tail and then used it to carry the drugs and other goods from one cell to another,” he said. “When the animal arrived at its destination, the prisoner took the mouse and removed the hook from its tail.”

Guards raided the cells and found 29 small packets of marijuana and 23 cocaine. They are now scrolling through CCTV footage to try and discover which prisoner was the mouse’s master.

Here’s the mouse at work,

The mouse was let off,

The mouse was taken outside and released nearby.

Apparently cats were the drug carriers of choice in the past, but I can’t imagine how they got the cats to allow it.