I think the first Model B would probably be reserved for whatever remained of habeas corpus's rotting carcass in any country that believes some of the world's citizens don't have rights.
The basic model would consist of a tiny GPS transceiver placed in a capsule and inserted under a person's skin, so that authorities could track him easily.
Model B would have an extra function — a dose of cyanide to remotely kill the wearer without muss or fuss if authorities deemed he'd become a public threat.
The inventor said the chip could be used to track terrorists, criminals, fugitives, illegal immigrants, political dissidents, domestic servants and foreigners overstaying their visas.
Saudi 'Killer Chip' Implant Would Track, Eliminate Undesirables (Fox News)