Digital evidence increasingly appears in cases
in which a detective is involved.
Mobile phones, computers, surveillance systems, data from IT systems,
or communications platforms are often treated as a natural element of operational activities.
In practice, however, a key question arises:
can a detective legally and effectively collect digital evidence
that is later intended to be used in court proceedings?
The answer is: it depends on the scope of the activities, the manner in which they are carried out,
and the purpose for which the material is obtained.
What digital evidence means in a procedural sense
Digital evidence is not merely the existence of data.
From the perspective of proceedings, what matters is:
- the legality of acquisition,
- the ability to establish the origin of the data,
- the integrity of the material,
- the possibility of subsequent verification.
If these elements are not met,
digital material loses its evidentiary value,
regardless of its content.
The scope of a detective’s activities and digital evidence
A detective operates within the limits defined by law.
A detective may:
- conduct operational activities,
- document findings,
- collect information in a lawful manner,
- secure supporting materials.
At the same time, there are clear boundaries,
the crossing of which may result in:
- the material being challenged,
- legal liability,
- the loss of evidentiary value.
What a detective can do safely
In practice, a detective may:
- document the factual state of affairs,
- secure media in an unaltered form,
- prepare descriptions and reports of activities,
- identify potential sources of data.
Such actions:
- organize the material,
- preserve context,
- do not interfere with the content of the data.
Where the risks begin
Risks arise when:
- data is independently analyzed,
- copies are made without a documented procedure,
- data is processed or selectively reviewed,
- the continuity of the chain of custody is not maintained.
In such situations, the problem is not intent,
but the lack of the ability to verify the material at a later stage.
The most common mistakes involving digital evidence
The most frequently encountered include:
- access to a phone or computer without a clear legal basis,
- creating copies “for review purposes”,
- lack of documentation regarding the time and method of data acquisition,
- transferring material to multiple individuals.
Any of these elements may result in the material
having informational value only.
When a court-appointed expert is required
The moment when:
- data is to be analyzed,
- conclusions are intended to have evidentiary significance,
- a case may be brought before a court,
is the moment when the detective’s role ends,
and the role of a court-appointed expert begins.
An expert:
- formally assesses the material,
- analyzes the integrity and reliability of the data,
- prepares conclusions for the purposes of proceedings.
The most common mistake
The most common mistake is the belief
that digital evidence can be “looked at” without consequences.
Any interference with data
may affect its subsequent assessment.
Summary
A detective may play a significant role
in securing and organizing material.
At the same time, digital evidence requires particular caution
if it is to be used in evidentiary proceedings.
In matters where:
- digital data is involved,
- there is a risk of dispute,
- court proceedings are anticipated,
critical importance lies in the proper separation of roles
and the timing of decision-making.
📧 biuro@wichran.pl
📞 +48 515 601 621
Piotr Wichrań
Court-appointed expert in computer science
Digital Forensics and IT/OT Cybersecurity Expert
Licensed Private Investigator Poland