Some guy keeps taking a c-r-a-p in my store, and...uses a pliers to remove security tags on merchandise he takes in the stall.

He leaves the packaging, and takes the item(s) and this time he left his cutting device at the base of the s-h-i-t-t-e-r.  Somehow part of the pliers (a part broken off) was found in the bowl itself that did not survive a flush because it was too heavy to be swept away by the water along with the poo.

People go to great lengths to steal.

Should I take a c-r-a-p in a bucket and set it outside the building, hidden in some bushes and then grab it, and dump it on the suspect the next time the suspect takes a d-u-m-p?