This section applies to—
fingerprints or impressions of footwear taken in connection with the investigation of an offence with the consent of the person from whom they were taken, and
a DNA profile derived from a DNA sample taken in connection with the investigation of an offence with the consent of the person from whom the sample was taken.
Material to which this section applies must be destroyed as soon as it has fulfilled the purpose for which it was taken or derived, unless it is—
material relating to a person who is convicted of the offence,
material relating to a person who has previously been convicted of a recordable offence, other than a person who has only one exempt conviction,
material in relation to which any of sections 64ZC to 64ZH applies, or
material which is not required to be destroyed by virtue of consent given under section 64ZL.
If material to which this section applies leads to the person to whom the material relates being arrested for or charged with an offence other than the offence under investigation—
the material is not required to be destroyed by virtue of this section, and
sections 64ZD to 64ZH have effect in relation to the material as if the material was taken (or, in the case of a DNA profile, was derived from material taken) in connection with the investigation of the offence in respect of which the person is arrested or charged.