"110. The obligation to protect the right to life underart 2 of the Convention , read in conjunction with the State's general duty underart 1 of the Convention to 'secure to everyone within [its] jurisdiction the rights and freedoms defined in [the] Convention', requires by implication that there should be some form of effective official investigation when individuals have been killed as a result of the use of force (...). The essential purpose of such an investigation is to secure the effective implementation of the domestic laws safeguarding the right to life and, in those cases involving State agents or bodies, to ensure their accountability for deaths occurring under their responsibility (...). …. 112. For an investigation into alleged unlawful killing by State agents to be effective, the persons responsible for and carrying out the investigation must be independent and impartial, in law and in practice (...). 113. The investigation must also be effective in the sense that it is capable of leading to a determination of whether the force used was or was not justified in the circumstances and to the identification and punishment of those responsible (...). The authorities must have taken the reasonable steps available to them to secure the evidence concerning the incident, including inter alia eye witness testimony and forensic evidence. The investigation's conclusions must be based on thorough, objective and impartial analysis of all relevant elements and must apply a standard comparable to the 'no more than absolutely necessary' standard required by art. 2 (2) of the Convention. Any deficiency in the investigation which undermines its capability of establishing the circumstances of the case or the person responsible is liable to fall foul of the required measure of effectiveness (...)."; and also as follows (see, among many other authorities, Anguelova v Bulgaria[2002] ECHR 38361 /97 at para 140): "140. There must be a sufficient element of public scrutiny of the investigation or its results to secure accountability in practice as well as in theory, maintain public confidence in the authorities' adherence to the rule of law and prevent any appearance of collusion in or tolerance of unlawful acts. The degree of public scrutiny required may well vary from case to case. In all cases, however, the next of kin of the victim must be involved in the procedure to the extent necessary to safeguard his or her legitimate interests (...)." 322. The Court would observe at this point that the obligation to carry out a prompt and effective investigation when individuals have been killed as a result of the use of force, and to bring, or enable, such proceedings as may be appropriate to the case, is not dependent on whether the said use of force itself is ultimately found to constitute a violation ofart 2 of the Convention . (2) At paras. 323-5 the Court explained that for an investigation to be "effective", it required to be both (1) "adequate" and (2) "independent"