criminal offences during trial taking into
account modern challenges.
Literature review
The studies on the issue under research covers
both general aspects of proving and problems
related to particular legal situations or those
existing in certain states.
Regarding the general aspects, experts
emphasize the assessment by the court based on
the “beyond a reasonable doubt” standard of each
piece of evidence separately and the totality of
evidence from the perspective of: a) reliability of
information; b) legality/illegality of the method
of obtaining it (Criminal Law Center, 2023;
Khanin, 2023; Nasinnyk, 2022). However,
commentators on ECHR case law draw attention
to problems with compliance with evidentiary
standards and conformity of decisions with the
requirements of the European Convention in
terms of proving procedures (McBride, 2009).
As a result, courts issue decisions that are later
appealed to the ECHR because of the ineffective
proving (for example: European Court of Human
Rights (2006a); European Court of Human
Rights (2006b)), etc.
Some authors believe that this criticism is
exaggerated. The low effectiveness of
prosecution can be due to objective factors: the
adoption of new legislation, crime trends,
priorities in the work of law enforcement
agencies (McGrath & Healy, 2021; Zarubei et al.,
2021). Besides, there are disagreements between
law enforcement officers regarding the
sufficiency of collected evidence (OECD, 2021).
Regarding specific problems, the following is
worth noting:
1. Specialists pay attention to the correlation
between crimes and features of proving, in
particular, regarding crimes in the field of
the latest technologies (Office of National
Statistics, 2022). At the same time,
traditional evidence (for example, witness
statements or DNA tests) cannot be used in
such cases. However, for other crimes –
murder, rape, burglary – this evidence is the
most effective (Amankwaa & McCartney,
2021; Dela Rama, 2022).
A difficult issue is ensuring the effectiveness of
proof in specific situations, in particular, in
conditions of armed conflict. For example, the
ECHR emphasizes the unconditional adoption of
all measures to investigate violations of the right
to life (European Court of Human Rights, 2011).
However, Ukraine’s experience shows
significant procedural difficulties in ensuring the
effectiveness of proving such crimes (Fedoriv,
2022).
2. The discussion on the place of victims in the
discourse regarding the effectiveness of
proving occupies a separate place:
− the influence of the category of victims on
the effectiveness of proving, because there is
a pattern between the type of crime and the
category of victims (Warner et al., 2017;
Office of National Statistics, 2022);
− the influence of the position of the victims
on the effectiveness of proving. Although
trials are a form of public communication
(Jeßberger & Steinl, 2022), courts
sometimes do not clarify the goal pursued by
the victim (Kompanets, 2021). A
consequence of this is the low activity of
victims regarding requests for compensation
for the harm caused (The right of victims).
3. Regarding the evidence that is mainly taken
into account in trials, experts most often
note: a) the problem of false testimony and
methods of levelling their influence on
proving (Luke et al. 2016; Dela Rama,
2022); b) problems of data collection on the
Internet and their use in proving (Lewulis,
2022; Council of Europe, 2020).
4. The study of the experience of different
countries (Australia, Latvia, Poland,
Ukraine, etc.) is a separate direction of
research. Positive aspects are noted
regarding: a) the effectiveness of proving in
jury trials (Warner et al., 2017);
b) availability of guidelines for proving
certain categories of crimes (OECD, 2021).
However, negative aspects are also
identified, for example, the lack of legal
tools for processing open online information
(Lewulis, 2022). In Ukraine, as a state with
a transitional legal system, the regulation of
the powers of the defence attorney to collect
evidence and present it during trial remains
imperfect (Mazur, 2020).
Regarding the improvement of proving
procedures, attention is paid to regulating the use
of the latest technologies (Turner, 2020), in
particular, the introduction of artificial
intelligence (D’Alessandra & Sutherland, 2021;
Shi, 2022). Along with this, it is proposed to
resolve: a) organizational issues, for example, in
terms of the introduction of the European warrant
for the demand and storage of digital data
(Lewulis, 2022); b) the issue of training