An ECHR case in which the court choose not to admit the report/testimony of a defense expert, resulting in a violation of Convention Article 6.1.
MATYTSINA v. RUSSIA 58428/10 27/03/2014
169. It is primarily for the national courts to decide whether a particular piece of evidence is formally admissible (see Garcia Ruiz v. Spain [GC] no. 30544/96, ECHR 1999-I, § 28). Similarly, under Article 6 it is normally not the Court’s role to determine whether a particular expert report available to the domestic judge was reliable or not (see Khodorkovskiy and Lebedev, cited above, § 700). Subject to some exceptions, the general rule is that the domestic judge has a wide discretion in choosing amongst conflicting expert opinions and picking one which he or she deems consistent and credible. However, the rules on admissibility of evidence may sometimes run counter to the principles of equality of arms and adversarial proceedings, or affect the fairness of the proceedings otherwise (see, for example, Tamminen v. Finland, no. 40847/98, §§ 40-41, 15 June 2004). In the context of expert evidence, the rules on its admissibility must not deprive the defence of the opportunity to challenge it effectively, in particular by introducing or obtaining alternative opinions and reports. In certain circumstances the refusal to allow an alternative expert examination of material evidence may be regarded as a breach of Article 6 § 1 (see Stoimenov v. the former Yugoslav Republic of Macedonia, no. 17995/02, §§ 38 et seq., 5 April 2007).
207. The Court is mindful of the fact that Judge M. heard a number of witnesses for the defence, examined several expert opinions and studied various documents. However, the question of whether or not the defence enjoyed “equality of arms” with the prosecution and whether the trial was “adversarial” cannot be addressed solely in quantitative terms. In the present case it was very difficult for the defence to effectively challenge the expert evidence submitted to the court by the prosecution. The Court stresses that the case against the applicant was built upon that expert evidence. In those circumstances, the way in which expert evidence was handled made the applicant’s trial unfair. Therefore, the Court does not need to address the other procedural violations alleged by the applicant.
208. On the strength of the above the Court concludes that there has been a violation of Article 6 § 1 of the Convention.
MATYTSINA v. RUSSIA 58428/10 27/03/2014
169. It is primarily for the national courts to decide whether a particular piece of evidence is formally admissible (see Garcia Ruiz v. Spain [GC] no. 30544/96, ECHR 1999-I, § 28). Similarly, under Article 6 it is normally not the Court’s role to determine whether a particular expert report available to the domestic judge was reliable or not (see Khodorkovskiy and Lebedev, cited above, § 700). Subject to some exceptions, the general rule is that the domestic judge has a wide discretion in choosing amongst conflicting expert opinions and picking one which he or she deems consistent and credible. However, the rules on admissibility of evidence may sometimes run counter to the principles of equality of arms and adversarial proceedings, or affect the fairness of the proceedings otherwise (see, for example, Tamminen v. Finland, no. 40847/98, §§ 40-41, 15 June 2004). In the context of expert evidence, the rules on its admissibility must not deprive the defence of the opportunity to challenge it effectively, in particular by introducing or obtaining alternative opinions and reports. In certain circumstances the refusal to allow an alternative expert examination of material evidence may be regarded as a breach of Article 6 § 1 (see Stoimenov v. the former Yugoslav Republic of Macedonia, no. 17995/02, §§ 38 et seq., 5 April 2007).
207. The Court is mindful of the fact that Judge M. heard a number of witnesses for the defence, examined several expert opinions and studied various documents. However, the question of whether or not the defence enjoyed “equality of arms” with the prosecution and whether the trial was “adversarial” cannot be addressed solely in quantitative terms. In the present case it was very difficult for the defence to effectively challenge the expert evidence submitted to the court by the prosecution. The Court stresses that the case against the applicant was built upon that expert evidence. In those circumstances, the way in which expert evidence was handled made the applicant’s trial unfair. Therefore, the Court does not need to address the other procedural violations alleged by the applicant.
208. On the strength of the above the Court concludes that there has been a violation of Article 6 § 1 of the Convention.