infected with mono-gono-sypho clap that is infectious to Islamists and Islamists only. Include a load of infected bedbugs to go along for the ride.
I was thinking of a homing beacon (like the one on Mellenium Falcon to track teh rebel base....)
When they have a huge celebration of his release, then Ka-Boom.
Strap a ham on him and say if you want him, come get him.
If hams are outlawed, only the outlaws will have hams.