The use of this staff is wrong and is prohibited as subject selection needs to be free from intervention by prison authorities or prisoners.
Explanation:
The use of this staff is restricted because it is covered under the authority of head of such prison. Such staffs are not trained or guided according to external people demand or need, because they are specific people and meant for some authorized and legal work only. Thus permitted sociologists are allowed to enter such region for study purpose but under rules and regulations where they are not permitted to ask for any support or favor regarding their documentary performance or to be part of report by physical involvement in any act.