28 TSALIKIDIS AND OTHERS v. GREECE JUDGMENT which the incident occurred and identifying the person or persons responsible for the death in question. 97. The Court notes that it has been presented with contradictory arguments as regards the scientific value of some of the findings. In this connection, the Court reiterates that in the absence of elements indicating that the conclusions of the national authorities were arbitrary or that they had manifestly ignored relevant facts, the Court will not substitute its own interpretation for theirs (see Seidova and Others v. Bulgaria, no. 310/04, § 57, 18 November 2010). The Court will therefore assess the effectiveness of the investigation in the light of the above-mentioned principles. 98. In this respect, the Court notes that the applicants brought to the attention of the domestic authorities new evidence which called into question the conclusions drawn after the initial preliminary investigation. Both the forensic reports drawn up at the applicants’ request identified a number of elements that were not consistent with a suicide and the psychiatric report concluded that the deceased’s personality was not compatible with the profile of a person with suicidal tendencies. Following the reopening of the case, an exhumation took place and histology, toxicology and forensic reports were prepared which did not reveal any drugs or poison in the biological material extracted but did reveal that the hyoid bone was broken. In addition, two of the three coroners who prepared new forensic reports following the exhumation concluded that the cause of his death remained unclarified, as opposed to the outcome of the initial autopsy in which it was concluded that cause of death was hanging with a noose. 99. Following these developments, the public prosecutor in charge of the investigation, citing the reference numbers of the new toxicology, histology and forensic reports, decided to close the supplementary investigation and uphold the conclusions of order 80/06 by which the initial investigation had been archived. 100. Contrary to the affirmation of the prosecutor, the Court considers that the available evidence was inconclusive, suicide being only one of the possible explanations for Mr Tsalikidis’ death. Although no poison or drugs were found in the biological material taken from Mr Tsalikidis’ body following exhumation, the reports drawn up by the technical experts at the applicants’ request identified a series of features inconsistent with the scenario of suicide, namely the lack of injuries which would have been caused by crashing against nearby furniture, the lack of cyanosis of the face, the contradictions concerning the position of the rope mark on the deceased’s neck, the lack of clarity as regards the cause of death, as well as the complexity of the knot, which apparently would have required “sailing knowledge”. Additionally, there was no apparent motive for suicide, as confirmed by the psychiatrist who prepared a report at the applicants’ request, and also by the witness who had been examined during