
Fingerprints being analysed in a laboratory. Officers failed to meet deadlines in the paper trail that would have allowed them to store the data, which meant it was deleted six months after it was collected.
The important material was accidentally thrown out because the correct paperwork had not been submitted, according to a report by the Telegraph.
Current rules state that evidence must be destroyed after six months if the subject has committed no offence.
However, special legislation allows for the information to be kept indefinitely if an application is made to have it deemed of national security importance. In this case the application was not submitted on time and the material was destroyed.
The error first came to light in March when it was reported only 450 files were affected, but a new report says the number of lost samples could be as high as 810.
Biometrics Commissioner Alastair MacGregor QC told the BBC on Friday that up to 108 files would have been approved for indefinite retention on national security grounds.















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