"(a) to obtain relevant evidence whether by questioning him or otherwise; (b) to preserve relevant evidence; or (c) pending the result of an examination or analysis of any relevant evidence or of anything the examination or analysis of which is to be or is being carried out with a view to obtaining relevant evidence." "
"1. Everyone has the right to liberty and security of person. No one shall be deprived of his liberty save in the following cases and in accordance with a procedure prescribed by law: ... (c) the lawful arrest or detention of a person effected for the purpose of bringing him before the competent legal authority on reasonable suspicion of having committed an offence ..."
"Everyone arrested or detained in accordance with the provisions of paragraph 1(c) of this Article shall be brought promptly before a judge or other officer authorised by law to exercise judicial power and shall be entitled to trial within a reasonable time or to release pending trial."
"Everyone who is deprived of his liberty by arrest or detention shall be entitled to take proceedings by which the lawfulness of his detention shall be decided speedily by a court and his release ordered if the detention is not lawful."
"45. In sum, domestic courts are under an obligation to review the continued detention of persons pending trial with a view to ensuring release when circumstances no longer justify continued deprivation of liberty. For at least an initial period, the existence of reasonable suspicion may justify detention but there comes a moment when this is no longer enough. As the question whether or not a period of detention is reasonable cannot be assessed in the abstract but must be assessed in each case according to its special features, there is no fixed time-frame applicable to each case. 46. The Court's case-law has not had occasion to consider the very early stage of pre-trial detention in this context, presumably as, in the great majority of cases, the existence of suspicion provides a sufficient ground for detention and any unavailability of bail has not been seriously challengeable. It is not in doubt however that there must exist the opportunity for judicial consideration of release pending trial as even at this stage there will be cases where the nature of the offence or the personal circumstances of the suspected offender are such as to render detention unreasonable, or unsupported by relevant or sufficient grounds. There is no express requirement of 'promptness' as in the first sentence of paragraph 3 of Article 5. However, such consideration, whether on application by the applicant or by the judge of his or her own motion, must take place with due expedition, in order to keep any unjustified deprivation of liberty to an acceptable minimum."