Satellite tracking image on a computer screen
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How the new psychiatric patient tagging system works

For the first time in Britain, a satellite tracking system is being used to monitor the movements of violent offenders with mental health problems.

It is to prevent them absconding or offending while on leave from a secure psychiatric hospital.

The BBC's home affairs correspondent, Danny Shaw, explains how the system works and hears from one patient who wears the ankle tag.

  • 25 Aug 2010