s 64ZN Use of retained material
(1) Any material to which section 64 applies which is retained after it has fulfilled the purpose for which it was taken or derived must not be used other than— (a) in the interests of national security, (b) for the purposes of a terrorist investigation, (c) for purposes related to the prevention or detection of crime, the investigation of an offence or the conduct of a prosecution, or (d) for purposes related to the identification of a deceased person or of the person to whom the material relates. (2) Material which is required to be destroyed by virtue of any of sections 64ZA to 64ZJ, or of section 64ZM, must not at any time after it is required to be destroyed be used— (a) in evidence against the person to whom the material relates, or (b) for the purposes of the investigation of any offence. (3) In this section— (a) the reference to using material includes a reference to allowing any check to be made against it and to disclosing it to any person, (b) the reference to crime includes a reference to any conduct which— (i) constitutes one or more criminal offences (whether under the law of a part of the United Kingdom or of a country or territory outside the United Kingdom), or (ii) is, or corresponds to, any conduct which, if it all took place in any one part of the United Kingdom, would constitute one or more criminal offences, and (c) the references to an investigation and to a prosecution include references, respectively, to any investigation outside the United Kingdom of any crime or suspected crime and to a prosecution brought in respect of any crime in a country or territory outside the United Kingdom.