ded that it lasts no longer than a certain period. Justification for any period of detention, no matter how short, must be convincingly demonstrated by the authorities (see Shishkov v. Bulgaria, No. 38822/97, § 66, ECHR 2003-I (extracts)).
51. It is incumbent on the domestic authorities to establish the existence of specific facts relevant to the grounds for continued detention. Shifting the burden of proof to the detained person in such matters is tantamount to overturning the rule of Article 5 of the Convention, a provision which makes detention an exceptional departure from the right to liberty and one that is only permissible in exhaustively enumerated and strictly defined cases (see Rokhlina v. Russia, No. 54071/00, § 67, 7 April 2005, and Ilijkov v. Bulgaria, No. 33977/96, §§ 84 - 85, 26 July 2001). The national judicial authorities must examine all the facts arguing for or against the existence of a genuine requirement of public interest justifying, with due regard to the principle of the presumption of innocence, a departure from the rule of respect for individual liberty, and must set them out in their decisions dismissing the applications for release. It is not the Court's task to establish such facts and take the place of the national authorities who ruled on the applicant's detention. It is essentially on the basis of the reasons given in the domestic courts' decisions and of the true facts mentioned by the applicant in his appeals that the Court is called upon to decide whether or not there has been a violation of Article 5 § 3 of the Convention (see Korchuganova v. Russia, No. 75039/01, § 72, 8 June 2006; Ilijkov, cited above, § 86; and Labita, cited above, § 152).
(b) Application to the present case
52. The applicant was arrested on 21 April 2003. He has been held in custody ever since. The period to be taken into consideration has lasted more than five years and ten months.
53. It is not disputed by the parties that the applicant's detention was initially warranted by a reasonable suspicion of his membership of an armed criminal gang and his involvement in the commission of several counts of aggravated robbery, kidnapping, extortion, infliction of serious injuries and murder. It remains to be ascertained whether the judicial authorities gave "relevant" and "sufficient" grounds to justify his continued detention and whether they displayed "special diligence" in the conduct of the proceedings. The inordinate length of the applicant's detention is a matter of grave concern for the Court. In these circumstances, the Russian authorities should have put forward very weighty reasons for keeping the applicant in detention for more than five years and ten months.
54. The judicial authorities relied, in addition to the reasonable suspicion against the applicant, on the risk of his absconding, reoffending or interfering with witnesses or jurors. In this respect they referred to the gravity of the charges, with a particular emphasis on the charge of membership of an armed criminal gang, and the absence of a registered place of residence in Volgograd.
55. The gravity of the charges was the main factor for the assessment of the applicant's potential to abscond, reoffend or obstruct the course of justice. Thus, in the appeal decision of 28 December 2006 the Supreme Court found that the gravity of the charges outweighed the specific facts militating in favour of the applicant's release, such as the considerable length of his detention pending trial, minor child, elderly parents and poor health (see paragraph 28 above). The courts assumed that the gravity of the charges carried such a preponderant weight that no other circumstances could have obtained the applicant's release. The Court has repeatedly held that, although the severity of the sentence faced is a relevant element in the assessment of the risk of an accused absconding
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