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The Mobile Identification has 'gone live' across the force as part of the Commissioner's commitment to make better use of technology to fight crime.
The MobileID is about the size of a mobile phone and allows police to read the fingerprint of an index finger. It checks the fingerprints with the national database but does not retain them afterwards.
The device will be used in instances where an individual is suspected of committing an offence, or wanted for a previous offence.