What is more likely to happen in the future is to implant all of our own military with tracking devices. Then when one is captured we can find them. I wish we could be a little more 007 with these guys. Actually I wish we could be a little more mafia with them, but the liberals would never allow the precious rights of murderers to be violated. If these were Christian psychos instead of Muslim ones the liberals would have already authorized the use of nukes.
Tracking devices small enough to be implanted would have to be RFID devices. The problem with that is that the RFID has to pass within a few feet (less than 10) of a detector to work. Also, if I were in the military, there is no way in hell I would allow them to inject a tracking device under their skin.