The importance of electronic evidence in modern criminal proceedings

Why has electronic evidence become decisive?

In criminal proceedings, the role of electronic evidence has increased dramatically in recent years. While testimony, documents and traditional physical evidence used to be at the centre of proof, in many cases digital data now provide one of the most important foundations for establishing the facts. Mobile phones, message exchanges, e-mails, location data, camera recordings, information from social media and log data connected to various online services may all be sources of decisive importance in assessing a criminal case.

What makes the probative value of digital data special?

The special nature of e-evidence lies precisely in the fact that its evaluation is much more complex than that of traditional forms of evidence. The significance of digital data is determined not only by its content, but also by its source, how it was recorded, under what procedural framework it was obtained, and whether its authenticity, integrity and traceability can be verified. A message, screenshot or electronic file is often only the surface; the real question is what technical and procedural-law background is connected to it.

EU e-evidence rules and cross-border data

Hungarian and European regulation is responding increasingly firmly to this development. The aim of legislation is no longer merely to recognise digital data as evidence, but also to create clearer frameworks for obtaining, preserving and evaluating it. The new EU e-evidence rules and changes in the domestic criminal-procedure environment both point towards cross-border data stored by service providers or available on online platforms playing an even greater role in investigations and court proceedings in the future.

Deleted data, cloud services and hidden digital traces

A particularly important feature of the digital environment is that it often preserves more than is visible at first sight. In practice, data believed to have been deleted can often be restored at least in part, and information no longer visible to the user may still appear as relevant evidence on a device, user account, cloud service or service-provider system. For this reason, an adequate defence in a criminal case cannot be based solely on what the person concerned saw or deleted on their own device. In many cases, a much broader set of data may be, or may previously have been, available to the investigating authorities.

Why does legal experience matter?

Legal experience has particular importance in this area. In cases involving digital evidence, it is necessary to recognise not only what has actually become part of the case file, but also what additional data may exist, what technical sources it may come from and to what extent it may come within the authorities’ scope of attention. Practical experience from earlier cases often helps to assess what evidence may be expected in a given procedure, where the weak points of the proof may be, and where questions may arise regarding the lawfulness, completeness or interpretation of the acquisition of evidence.

Digital evidence as a strategic element of the defence

In my view, one of the keys to effective representation in cases involving e-evidence is that digital data should not be treated merely as a technical detail, but as a strategic element of the defence. Based on my experience, it may be particularly important to examine whether the electronic data in question is genuinely authentic, whether it entered the proceedings in unchanged form, whether it is complete, and whether the official acquisition and processing of the data fully complied with statutory requirements. It may be equally important to consider what further digital traces may exist and how they could affect the assessment of the case.

When is it worth contacting a lawyer?

In criminal proceedings today, it is increasingly rare for the digital environment to remain merely in the background. In many cases, this is precisely the area where the soundness of the accusation, the strength of the evidence or the possibilities of the defence are decided. Therefore, in any case where phone data, online communication, deleted content, location data, electronic files or platform use may play a role, or where electronic data carriers or phones have been seized by the police, early, considered and professionally grounded legal assessment is especially important.