Retention period of CCTV image/footage

Freedom of information request reference no: 01.FOI.24.035940

I note you seek access to the following information:

1. Is there a limit on how long you will retain a copy of CCTV imagery/footage connected with unresolved crimes ("cold cases")? If so, how long is such footage kept, and how is a decision made on when it should destroyed?
2. For such retained footage, what measures are taken to ensure that they are usable in the future (for example, tapes and CD media decay over time)?
3. If such footage is output from a CCTV system, are measures taken to ensure that the footage can be played on new CCTV systems jn use by the MPS/Courts? I presume that the digital date/time stamps used are permanent and uneditable.
4. How is chain of custody maintained for CCTV imagery for cold cases? Is there a digital system in use, or are paper forms used?

Decision

I have today decided to disclose the located information to you in full.

Please find below information pursuant to your request above.

Q1 - Is there a limit on how long you will retain a copy of CCTV imagery/footage connected with unresolved crimes ("cold cases")? If so, how long is such footage kept, and how is a decision made on when it should destroyed?

CCTV evidence is retained in line with all other evidence according to guidelines issued by the College of Policing Review, retention and disposal | College of Policing, these also outline the decision criteria for disposal.

Q2 - For such retained footage, what measures are taken to ensure that they are usable in the future (for example, tapes and CD media decay over time)?

Physical exhibits including, VHS, data tapes, disks, USB and hard drives etc. are stored in crates, boxes and evidence bags within a purpose-built warehouse, to protect against damage. Processes are in place to periodically review these items, and it is acknowledged that older technology is harder to maintain than modern removable media.

Q3 - If such footage is output from a CCTV system, are measures taken to ensure that the footage can be played on new CCTV systems jn use by the MPS/Courts? I presume that the digital date/time stamps used are permanent and uneditable.

Yes, processes are in place to ensure the any footage required for court are made available in a suitable format. The original material (exhibit) will always be retained so a copy can be provided for disclosure, should there be any challenges.

Q4 - How is chain of custody maintained for CCTV imagery for cold cases? Is there a digital system in use, or are paper forms used?

The chain of custody for the original exhibit is the same as for all exhibits, with any movement, action or change of storage location being recorded. Today these are recorded with the MPS’s Connect System and when applicable the Digital Forensics Case Management System.