§ Mr. Watson
To ask the Secretary of State for the Home Department how many people have had their sentences quashed as a result of DNA evidence. 
§ Paul Goggins
DNA technology can be used both to help the police identify criminals and to eliminate suspects. Convictions may be secured with the assistance of DNA evidence but it may also be a factor in leading to the quashing of a particular conviction and sentence. However, the information on the numbers of such appeal cases is not available centrally and could be provided only at disproportionate cost.