Thank you, Mr. Chair.
Thank you very much, Professor Nellis, for your expertise in this matter. Your expertise is needed, because I don't understand this system at all.
You said that from 2004 to 2006, England and Wales experimented with GPS. In the time since and before then, what technology was employed? Is it simply that if an individual leaves a perimeter, some sort of alarm is signaled, and that alarm is monitored by a police office?
If the technology isn't GPS, what is it?