Critically Endangered small

Digital materials assessed by police and other authorities in the course of investigation and retained as evidence of due process such as case files and correspondence, including materials not submitted to court

Group: Digital Legal Records

Trend in 2021:

Consensus Decision

Added to List: 2019

increased riskTrend towards greater risk

Previous classification: Critically Endangered


Trend in 2022:


No change No Change


Imminence of Action

Action is recommended within twelve months, detailed assessment is a priority.

Significance of Loss

The loss of tools, data or services within this group would impact on people and sectors around the world.

Effort to Preserve

It would require a major effort to prevent losses in this group, such as the development of new preservation tools or techniques.


CCTV; Email; 3d scanning; social media interactions; police records; court records; text messages.

‘Practically Extinct’ in the Presence of Aggravating Conditions

Poor chain of custody; fragile or obsolete media; dependence on proprietary formats or products; lack or loss of documentation; inaccessible to web harvesting technologies; lack of version control; lack of integrity checks or integrity records; poor chain of custody.

‘Endangered’ in the Presence of Good Practice

Meticulous transfer and disclosure processes

2021 Jury Review

This entry was added in 2019 as an entry made in 2017 for ‘Digital Legal Records and Evidence,’ which the Jury split into four more discrete entries. This category includes evidence prior to court that may form part of an investigation or gathering of evidence but which are not formally submitted as evidence. It recognizes that police and other investigating authorities are not limited in the types of evidence that they need to administer, but that this creates an almost unbounded limit of preservation requirements to ensure authenticity and admissibility. A 2021 risk was identified based on examples bringing to question whether legal bodies have the skills and capabilities to preserve these materials should they need them if a case is reopened etc.

Additional Comments

Case files and correspondence are one thing: retention of these should be clear but may differ widely between jurisdictions and levels of government. If retention is not long-term or permanent, the risk of loss may not be so critical. Retention of 'unused' or 'potential' evidence is likely a different matter altogether. Is it even a record? Certainly, it is not a record of the court. Should it be returned to the suspect or accused? Are their rights being considered here - not just in terms of preservation, but also simply disposition? There may be legal and ethical issues around this that need to be fleshed out in conjunction with assessing its preservation risk.

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