The purpose of the polygraph is to check the compliance of high risk sexual offenders with their licence conditions and to monitor the risk they present to the public. It is also used to improve the way in which the offender is managed during release on licence.
An offender may be recalled if they fail to comply with the polygraph examination, attempt to ‘trick’ the test or if they disclose that they have failed to comply with their licence conditions.
The legislation for imposing the polygraph test on sexual offenders is enshrined in the Offender Management Act 2007. Section 30 of the Act specifically prohibits evidence of any matter mentioned in the polygraph being used in any proceedings against a released person for an offence in a criminal court.