From Screenshots to Signatures: Why Evidence Reliability Matters

Earlier this year, we hosted a series of forensic briefings at our London office titled ‘When the wheels fall off’ to focus on digital, questioned document and imagery forensics. The sessions brought together HR and legal professionals to discuss the risks of taking relevant evidence at face value and how forensic insight can make a critical difference to ensure it is accurately assessed, interpreted, and presented.  

Most organisations are well-equipped to handle everyday matters such as staff discipline, unprofessional conduct or theft of data, as examples. We see that challenges often arise when an issue evolves beyond a standard HR process, escalating into litigation or regulatory review, disputed evidence or where there is a significant risk of reputational damage.  In these cases, it is vital that evidence handling procedures are strictly maintained and expert assistance is brought in at an early stage.

The importance of getting the foundations right

The benefit of early engagement with a forensic expert allows teams to help design an approach that is robust from the outset, whereas delay can create avoidable challenges in terms of lost or inadmissible evidence. 

These challenges often centre around the logistics evidence handling, quality of sources and interpretation of evidential material. Those early decisions matter and they form the solid foundations for a robust and credible investigation. 

Not always what it seems

Many workplace investigations rely heavily on digital and documentary evidence like emails, screenshots, physical documents, CCTV or other images.

One of the key themes from this briefing was the perils of taking everything at face value and how evidence can be misleading, either by malicious action, inaccurate interpretation or insufficient verification.

It might sound obvious but we need only look to sporting replays to see that, even with the benefit of multiple camera angles and expert commentary, interpretation is not always straightforward. As many football fans will appreciate, the debate around whether a particular challenge should result in a penalty can hinge on perspective and technical analysis. The same principle applies in workplace investigations where context and expertise are critical.

Whether it’s a fabricated screenshot of text messages, a tampered pdf, manipulated hardcopy documents or CCTV that has been misinterpreted, relying on surface-level information can expose an organisation to the risk of drawing an incorrect conclusion. 

The increasing complexity of modern investigations

The sessions explored our real-world experience of detecting the methods of data theft, proving inappropriate workplace behaviour, and detecting forged signatures. All of these required deeper analysis showing how the different strands of forensic expertise can help answer a fundamental question: Is this evidence reliable, correctly understood and capable of standing up to scrutiny? 

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