A/HRC/RES/30/7 9. Calls upon States to apply individual criminal responsibility and to refrain from detaining persons solely on the basis of their family ties with an alleged offender; 10. Also calls upon States to ensure that anyone who is deprived of his or her liberty has prompt access to a competent court with the effective power to determine the lawfulness of the detention and to order release if the detention or imprisonment is determined not to be lawful, as well as prompt access to legal counsel, in accordance with their international obligations and commitments; 11. Urges all States to consider establishing, maintaining or enhancing independent mechanisms with the mandate to monitor all places of detention, including by making unannounced visits, and to hold private interviews without witnesses with all persons deprived of their liberty; 12. Calls upon States to ensure a proper file and data management system on prisoners that allows the tracking of the number of persons deprived of their liberty, their detention period and developments regarding the prison population; 13. Recalls the absolute prohibition of torture and cruel, inhuman or degrading treatment or punishment in international law, and calls upon States to address and prevent detention conditions of persons deprived of their liberty that amount to torture or cruel, inhuman or degrading treatment or punishment; 14. Calls upon States to investigate promptly, effectively and impartially all alleged human rights violations and abuses suffered by persons deprived of their liberty, in particular cases involving death, torture and cruel, inhuman or degrading treatment or punishment, to provide effective remedies to the victims, and to ensure that detention administrations cooperate fully with the investigating authority and preserve all evidence; 15. Encourages States to address overcrowding in detention facilities by taking effective measures, including through enhancing the availability and use of alternatives to pretrial detention and custodial sentences, access to legal aid, mechanisms for crime prevention, early release and rehabilitation programmes and the efficiency and capacity of the criminal justice system and its facilities, and to make use in this regard of, inter alia, the United Nations Office on Drugs and Crime Handbook on Strategies to Reduce Overcrowding in Prisons; 16. Calls upon States to review penal policies that can contribute to overincarceration and overcrowding, in particular regarding so-called “zero-tolerance” policies, such as the application of mandatory pretrial detention and mandatory minimum sentences, especially for minor and/or non-violent crimes; 17. Urges States to endeavour to reduce pretrial detention, which should be a measure of last resort and for as short a period as possible by, inter alia, adopting legislative and administrative measures and policies on its preconditions, limitations, duration and alternatives, and by taking measures aimed at implementing existing legislation, as well as by ensuring access to justice and legal advice and assistance; 18. Underscores the particular importance of providing appropriate training for prosecutorial and judicial authorities with a view to ensuring proportionate sentencing and enhancing the implementation of non-custodial measures at the pretrial and post-conviction stages; 19. Recognizes that every child and juvenile alleged as, accused of or recognized as having infringed the law, particularly those who are deprived of their liberty, as well as child victims and witnesses of crimes, should be treated in a manner consistent with his or her rights, dignity and needs, in accordance with international law, bearing in mind relevant international standards on human rights in the administration of justice and taking into 4