body. In connection with prima facie cases of torture and ill-treatment, the suspect should be subject to suspension or reassignment during the process of investigation, especially if there is a risk that he or she might impede the investigation; (b) Try the perpetrators and impose appropriate sentences on those convicted in order to eliminate the de facto impunity for law enforcement personnel who are responsible for violations prohibited by the Convention. Compensation and rehabilitation (17) While noting that the Act on Assistance to Victims contains provisions regarding the right to compensation for victims of crimes and supporting services available for such victims, the Committee regrets the lack of a specific programme to safeguard the rights of victims of torture and ill-treatment. The Committee also regrets the lack of available information regarding the number of victims of torture and ill-treatment who may have received compensation and the amounts awarded in such cases as well as the lack of information about other forms of assistance, including medical or psychosocial rehabilitation, provided to these victims (art. 14). The State party should strengthen its efforts in respect of compensation, redress and rehabilitation in order to provide victims with redress and fair and adequate compensation, including the means for as full rehabilitation as possible. The State party should develop a specific programme of assistance in respect of victims of torture and ill-treatment. Furthermore, the State party should provide in its next periodic report information about any reparation programmes, including treatment of trauma and other forms of rehabilitation provided to victims of torture and ill-treatment, as well as the allocation of adequate resources to ensure the effective functioning of such programmes. Prisoners placed under a special security regime (18) The Committee is concerned at the situation of the so-called “Grade 4 prisoners” who may be placed in a maximum security cell or ward with severe restrictions of their rights resulting in extreme isolation and deprivation of human contact. Furthermore, the Committee notes with concern that, according to information before the Committee, neither the Admission Committee of a given penitentiary institution nor the special committee appointed by the national commander issue formal resolutions and that the “Grade 4 prisoners” cannot appeal to any higher-level authorities or any courts (arts. 2, 13 and 16). The State party should review and refine the system of classifying prisoners as Grade 4 with a view to ensuring that this grade is only applied - and retained - in respect of prisoners who genuinely require to be accorded such a status and review without further delay their current policy with regard to the application of means of restraint to prisoners placed under this system. Furthermore, the State party should establish a proper appeal procedure relating to this special security regime as well as adequate review mechanisms relating to its determination and duration. The Roma (19) The Committee is deeply concerned at reports of a disproportionately high number of the Roma in prisons and ill-treatment of and discrimination against the Roma by law enforcement officials, especially the police (arts. 11 and 16). The State party should intensify its efforts to combat discrimination against and ill-treatment of the Roma by law enforcement officials, especially the police, including through the strict application of relevant legislation and regulations providing for sanctions, adequate training and instructions to be given to law enforcement bodies and the sensitization of the judiciary. Furthermore, the State party should strengthen its support to the grant programme for support of police officers of Roma origin and to the Roma Police Officers Association. 23