A/67/44 Police crowd-control methods (22) The Committee is concerned about reports on the excessive use of force by law enforcement officers often in the context of crowd control at federal and provincial levels, with particular reference to indigenous land-related protests at Ipperwash and Tyendinaga as well as the G8 and G20 protests. The Committee is particularly concerned about reports of severe crowd control methods and inhumane prison conditions in the temporary detention centres (arts. 11 and 16). The Committee recommends that the State party strengthen its efforts to ensure that all allegations of ill-treatment and excessive use of force by the police are promptly and impartially investigated by an independent body and those responsible for such violation are prosecuted and punished with appropriate penalties. Furthermore, the State party and the government of the Province of Ontario should conduct an inquiry into the Ontario Provincial Police’s handling of incidents at Tyendinaga and into all aspects of the policing and security operations at the G8 and G20 Summits. Data collection (23) The Committee regrets the absence of comprehensive and disaggregated data on complaints, investigations, prosecutions and convictions of cases of torture and ill treatment by law enforcement, security, military and prison personnel, and on extrajudicial killings, enforced disappearances, trafficking and domestic and sexual violence. The State party should compile statistical data relevant to the monitoring of the implementation of the Convention obligations at the national level, including data on complaints, investigations, prosecutions and convictions of cases of torture and illtreatment, detention conditions, abuse by public officials, administrative detention, trafficking and domestic and sexual violence and on means of redress, including compensation and rehabilitation, provided to the victims. (24) The Committee recommends that the State party strengthen its cooperation with United Nations human rights mechanisms and its efforts in implementing their recommendations. The State party should take further steps in ensuring a well-coordinated, transparent and publicly accessible approach to overseeing implementation of Canadian obligations under the United Nations human rights mechanisms, including the Convention. (25) In the light of the State party’s pledges to the Human Rights Council in 2006 and its acceptance of recommendations by the Working Group on the Universal Periodic Review (A/HRC/11/17, para. 86 (2)), the Committee urges the State party to accelerate the current domestic discussions and to ratify the Optional Protocol to the Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment as soon as possible. (26) The Committee invites the State party to ratify the core United Nations human rights treaties to which it is not yet a party, namely the International Convention for the Protection of All Persons from Enforced Disappearance and the International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families. (27) The State party is requested to disseminate widely the report submitted to the Committee and the Committee’s concluding observations, in appropriate languages, through official websites, the media and non-governmental organizations. (28) The State party is invited to update its common core document (HRI/CORE/1/Add.91), in accordance with the requirements of the common core document contained in the harmonized guidelines on reporting under the international human rights treaties (HRI/GEN.2/Rev.6). (29) The Committee requests the State party to provide, by 1 June 2013, follow-up information in response to the Committee’s recommendations related to: (a) ensuring or 122 GE.12-44492