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Police retention of prints and samples: Proposals for legislation

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3. Effectiveness of the retention policy in England and Wales

3.1 Officials at the National DNA Database have provided an update of the number of DNA profiles retained in England and Wales since 11 May 2001 (when the law was changed there) that would have had to have been removed from the database under the old law, and the number of offences which had been linked to these profiles:

As of 31 March 2005 it is estimated that there are around 198,000 DNA profiles on the Database which would previously have fallen to be removed. From these, approximately 7,591 profiles of individuals have been linked with crime scene stains involving 10,754 offences. These offences include 88 murders, 45 attempted murders, 116 rapes, 62 other sexual offences, 91 aggravated burglaries and 94 offences of the supply of controlled drugs.

3.2 It is not possible to ascertain how many convictions were secured because of the new law on DNA retention, if for no other reason than it is impossible to know for certain why a jury makes a decision in any particular case. Police investigations and prosecutions are achieved through integrated criminal investigation, not through any one tool (such as DNA and/or other prints and samples) alone. However, although exact numbers are not available, a DNA match will have been useful in all of these investigations, substantially enhancing the efficiency of the investigations and in some cases will have been key to a successful outcome. Thus, widening DNA retention could help solve a significant number of offences committed in Scotland, including some very serious crimes. DNA retention can also be very effective in clearing the innocent from any involvement in a particular offence.

3.3 It remains the case that around 190,000 out of 198,000 DNA profiles, retained by the police under the new legislation, have not been linked with any subsequent crime scene. It could therefore be argued that the great majority of these profiles have been retained on the database for no purpose. However, there is also no evidence that the people from whom they were taken have in any way suffered or been discriminated against, as a result of their profiles being retained in this way.

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Page updated: Friday, June 17, 2005