A screenshot, location map or laboratory report can appear more objective than a witness. Its authority comes from a device, method or expert vocabulary rather than a person’s memory. Yet technical evidence is reliable only when the court can test where the material came from, what happened to it and how the conclusion was reached.
The most productive defence question is rarely “Do we agree with the expert?” It is “What precise question was the expert asked, and does the stated method answer it?”
Define the proposition before examining the tool
A phone extraction may show that a message existed on a device. That is not necessarily proof of who wrote it. Location data may place an account, handset or network connection in an area without identifying the person carrying it. Facial comparison, voice analysis, handwriting and toxicology each have their own limits and error sources.
The report should distinguish observation from interpretation. A table of file times is an observation produced through a process. The statement that those files prove planning is an inference that may depend on account access, time-zone settings and surrounding communications.
Trace the item from collection to opinion
Record who found the device or sample, how it was packaged, whether it was sealed and each transfer thereafter. For digital material, ask whether investigators worked from the original or a forensic copy and whether integrity values were recorded. For biological or chemical samples, consider collection, contamination, storage, quantity and consumption during testing.
A break in documentation does not automatically make evidence false, but it can prevent the court from knowing whether the item examined was unchanged and properly identified.
Examine competence, method and materials
Expertise is task-specific. A skilled computer technician may not be qualified to attribute authorship; a medical expert may identify injury but not reconstruct a collision. The report should state the expert’s field, materials received, method used, assumptions, results and basis for the conclusion.
Reproducibility matters. Could another qualified expert apply the described process to the same material and understand how the result was obtained? Undisclosed software settings, selected data or an unexplained confidence phrase may prevent meaningful review.
Ask a neutral question
Parties may initiate expertise and frame questions, but the expert does not decide guilt, legal responsibility or witness credibility. “Did the accused commit fraud?” is a legal conclusion. “Are specified files present, when were they created and what user artefacts are associated with them?” is capable of technical examination.
In forensic expertise in Georgian criminal cases, early participation can protect the opportunity for a second opinion, additional testing or preservation of unused material. Waiting until a sample is consumed or a device returned to service may make the disagreement impossible to test.
Put the result back into the whole case
Even a sound result has a defined weight. DNA on a movable object may prove contact without proving when or why it occurred. A matching hash proves file identity, not the truth of the file’s content. A toxicology result requires timing and clinical context.
Technical evidence is strongest when its limits are stated honestly. Courts do not need a contest of impressive labels. They need a traceable source, a suitable expert, a transparent method and a conclusion no broader than the data supports.
