This will be a test for all that innovative biometrics of the Israelis. Each detainee is sculptured. The detainment facilities have run thousands of hours of biometrics logging just about any imaginable movement all the detainees/prisoners have taken. So true, it is a risk releasing those convicted of very violent crimes, but there will be an advantage, in that their destinations will be far away, and the challenge is to successfully monitor them as they move closer and closer back towards Israel. Luckily it is no longer a manpower intensive process.