- 17 Consequently, the CPT recommends: - that a very high priority be given to human rights education for police officers of all ranks and categories as well as to training in modern investigation techniques. Experts not belonging to the police force should be involved in this education and training; - that an aptitude for interpersonal communication be a major factor in the process of recruiting police officers and that, during the training of such officers, considerable emphasis be placed on acquiring and developing interpersonal communication skills. The CPT would also like to receive detailed information on the length and content of police training. 29. Of course, it is also highly important for the relevant national authorities as well as senior police officers to deliver the clear message that the ill-treatment of detained persons is not acceptable and will be dealt with severely. The CPT welcomes the fact that the Greek authorities have already taken the initiative to issue a circular on this very subject (cf. circular N 4808/4/76 of 28 July 1993 referred to at page 38 of the Ministry of Public Order's report) and would appreciate receiving a copy of that Circular. 30. Naturally, one of the most effective means of preventing ill-treatment by public officials lies in the diligent examination by the prosecuting authorities and the courts of all complaints of such treatment brought before them and, where appropriate, the imposition of a suitable penalty. This will have a very strong dissuasive effect. In this connection, it must be said that the CPT's delegation was told by several prisoners who alleged ill-treatment by the police that they had complained to the public prosecutor before whom they were brought about the way they had been treated, but that he had displayed little interest in the matter. In this respect, the CPT would like to receive the following information: - for the period 1990 to 1993, the number of cases in which public prosecutors have instituted criminal proceedings for ill-treatment by the police of detained persons; - for the same period, an account of judgments delivered by the courts in cases involving allegations of ill-treatment by the police (i.e. brief description of the facts; verdict; if appropriate, sentence imposed). The CPT would also appreciate receiving information on the administrative/ disciplinary procedures applied in cases involving allegations of ill-treatment by the police. In particular, it would like to receive full details of the guarantees ensuring the objectivity of such investigations (cf. page 33 of the Ministry of Public Order's report).