Put one in every one of the GITMO boys then let them go and follow the trails.

Problem is how to get one in without them noticing. You might be able to get one inside a capsule disguised as medicine or in food. It could attach iteself to the intestinal wall by means of tiny barbs (you wouldnt feel it) which would become permanent as the tissue grows around it. You would coat it with something which would dissolve when it hits the right spot, like a time release capsule.

Spindok