Placement of prisoners in the maintenance service is in some way an isolation by which the prison administration is trying to avoid the tensions among the prisoners. This is exactly why the prisoners responsible for cleaning constitute a vulnerable group and their placement happens in a following way: before transferring to the institution, the administration has the information regarding the prisoners and when there is even a doubt that a person might have had a sexual interaction voluntarily or forcibly with the person of same sex, that person will definitely be placed separately from the other prisoners – in the maintenance part or in a closed establishment. Otherwise, that person will be under a serious risk from the other prisoners. Besides, the persons who have committed violent sexual offenses might be placed in the same part. Attention should be paid to the placement of those persons who became victims of violence due to the various reasons. They call it “spoiling.” Those individuals, while serving the sentence, and throughout there entire life are stigmatized and together with the above-mentioned groups are excluded from the society both in the system and outside. According to the informal prison rules, the persons placed separately, responsible for cleaning should not have a physical contact or verbal communication with the rest of the convicts. Based on the established rules, it is forbidden to talk to them, to take items from their hands, to shake hands with them or greet them in any way, to utilize the inventory used by them and generally, to be in the same space with them. Therefore, the above individuals cannot be involved in the rehabilitation or other events of the institution. This kind of classification from the facility’s administration is justified by the security reasons and is considered that this is the only way to protect the interests of the prisoners and the general regime of the establishment. This kind of prisoners have a distinctive sign in the institution – they are wearing a special maintenance uniform, which has two grey lines on the trousers. The rest of the inmates recognize them and know that should not go close to them. The monitoring results demonstrated that the persons involved in the prison maintenance work, responsible for cleaning do not constitute self-identified GBT persons. However, they are identified with GBT persons by the other prisoners and due to the influence of the criminal sub-culture are discriminated on this ground. Persons responsible for cleaning are referred to with the offensive terminology by the other inmates. Unfortunately, it should also be noted that some personnel of the administration also refer to those prisoners with the offensive language. As observed by the Special Prevention Group, the above is also caused by the influence of the criminal sub-culture existing in the penitentiary institutions. During the conversation with the prisoners in charge of cleaning, their frankness was hindered by stigmatization and self-censorship. The members of the monitoring group had an impression that the persons responsible for cleaning did not wish to talk about NATIONAL PREVENTIVE MECHANISM (NPM), 2015 147