A/HRC/40/59/Add.1 (f) Offer more and meaningful work opportunities and activities, conducive to both physical and mental health, to inmates in semi-open and closed establishments, particularly those serving long sentences, including life sentences; (g) Ensure the access of persons in pretrial detention to as much social contact and physical activity as possible, taking into account that pretrial detention is not a punitive regime and remains governed by the presumption of innocence; (h) Ensure that adequate psychological treatment is readily available in cases where inmates have inflicted self-injury, or show behaviour suggesting they may do so, and provide training to prison personnel so that they can identify and deal with early signs of potential mental illness; (i) Ensure fair process in relation to solitary confinement and other disciplinary measures, including by guaranteeing inmates legal remedies to challenge the decision and ensure an independent review; (j) Ensure the availability of effective in situ complaints mechanisms by providing for confidential and anonymous access to sealed complaint boxes for all inmates, including those in closed or high-security regimes; (k) Consider revising the applicable regulations and practices so as to facilitate, to the maximum extent possible, visits and other communication with the outside world, particularly for pretrial detainees. 106. In regard to the prevention of torture and other ill-treatment, the Special Rapporteur recommends that the Government of Serbia: (a) Provide the regulations, instructions and training required for ensuring the transition from an unreliable, confession-based interrogation system to a modernized forensic, non-coercive investigation methodology aimed at accurate and reliable establishment of the facts; (b) Ensure accessible, fully independent, expedient and effective complaints, oversight and investigative mechanisms for the prevention, investigation and prosecution of abuse, not only by police and prison staff, but by officials from all branches and services of government; (c) Ensure systematic medical examinations by independent medical personnel trained in the effective investigation, interpretation and documentation of the signs of physical and psychological torture and other forms of ill-treatment, based on the Istanbul Protocol. In particular, ensure that photographic documentation of trauma injuries becomes routine practice, including by making available appropriate equipment in all medical services; (d) Establish a fully independent police complaints body and consider including in the composition of the independent investigation mechanism one or more independent forensic experts; (e) In order to ensure consistency in the documentation of physical and psychological trauma, take measures to ensure full compliance with international standards, as set out in the Istanbul Protocol; (f) Establish dedicated interview rooms with audio and/or video equipment for the systematic recording of all investigative interviews conducted by police and other investigating authorities. 107. In regard to institutions for persons with psychosocial disabilities, the Special Rapporteur recommends that the Government of Serbia: (a) Establish effective, independent, and multidisciplinary mechanisms for the supervision of institutions for persons with psychosocial disabilities and for the regular review of any decision to institutionalize or deprive such persons of their legal capacity; 17