86 35. To be effective, the investigation must also be conducted in a prompt and reasonably expeditious manner. The CPT has found cases where the necessary investigative activities were unjustifiably delayed, or where prosecutorial or judicial authorities demonstrably lacked the requisite will to use the legal means at their disposal to react to allegations or other relevant information indicative of ill-treatment. The investigations concerned were suspended indefinitely or dismissed, and the law enforcement officials implicated in ill-treatment managed to avoid criminal responsibility altogether. In other words, the response to compelling evidence of serious misconduct had amounted to an “investigation” unworthy of the name. 36. In addition to the above-mentioned criteria for an effective investigation, there should be a sufficient element of public scrutiny of the investigation or its results, to secure accountability in practice as well as in theory. The degree of scrutiny required may well vary from case to case. In particularly serious cases, a public inquiry might be appropriate. In all cases, the victim (or, as the case may be, the victim's next-of-kin) must be involved in the procedure to the extent necessary to safeguard his or her legitimate interests. 37. Disciplinary proceedings provide an additional type of redress against illtreatment, and may take place in parallel to criminal proceedings. Disciplinary culpability of the officials concerned should be systematically examined, irrespective of whether the misconduct in question is found to constitute a criminal offence. The CPT has recommended a number of procedural safeguards to be followed in this context; for example, adjudication panels for police disciplinary proceedings should include at least one independent member. 38. Inquiries into possible disciplinary offences by public officials may be performed by a separate internal investigations department within the structures of the agencies concerned. Nevertheless, the CPT strongly encourages the creation of a fully-fledged independent investigation body. Such a body should have the power to direct that disciplinary proceedings be instigated. Regardless of the formal structure of the investigation agency, the CPT considers that its functions should be properly publicised. Apart from the possibility for persons to lodge complaints directly with the agency, it should be mandatory for public authorities such as the police to register all representations which could constitute a complaint; to this end, appropriate forms should be introduced for acknowledging receipt of a complaint and confirming that the matter will be pursued. If, in a given case, it is found that the conduct of the officials concerned may be criminal in nature, the investigation agency should always notify directly – without delay – the competent prosecutorial authorities.