Rights of Indigenous Peoples, which establishes the obligation of States to take effective measures to ensure that indigenous peoples can understand and be understood in political, legal and administrative proceedings, where necessary through the provision of interpretation or by other appropriate means. 347. The Subcommittee recommends that the State party strengthen existing means of communication for indigenous persons deprived of their liberty and, where necessary, provide interpreters or other appropriate means of communication. The State should also ensure the application of an affirmative action approach in penitentiary institutions in order to enable indigenous persons deprived of their liberty to maintain their customs and practices to the greatest possible extent. In order not to compound the effect of their being uprooted from their ancestral lands and separated from their families, who have limited means for visiting them, the State should ensure that they are assigned or reassigned to the prison facility closest to their native communities. 348. The Subcommittee urges the authorities of the State party to investigate all allegations of abuse and degrading treatment by police officers and stresses the duty of the State party to ensure that such conduct does not go unpunished. 349. The Subcommittee recommends that the State party consider conducting an assessment of the abuse allegedly often suffered by women at the hands of police officers when they are arrested. The Subcommittee also recommends that the Mexican State take appropriate security and control measures with respect to visitors to the prison, particularly women, ensuring respect for their dignity and privacy. 5.Failure to investigate, impunity and lack of redress 350. The Subcommittee urges the State party to establish mechanisms and controls for following up on allegations of torture, to create a national assistance programme to provide redress for victims of acts of torture and to mount a prevention campaign aimed at averting the recurrence of such acts. Annex I Places of detention visited The delegation visited 12 police stations and judicial agencies with detention facilities In Mexico City: Arraigo Nacional Federal (nacional arraigo detention centre) Agencia de Separos Federales (federal detention centre, calle Liverpool) Agencia No. 50 (Agency No. 50) In Jalisco: Separos de la Secretaría de Seguridad Pública (detention facility of the Ministry of Public Security) Arraigo 2750 Avenida Cruz del Sur (arraigo detention house at 2750 Avenida Cruz del Sur) Procuraduría General de Justicia del Estado (Office of the State Attorney-General, Calle 14) Separo principal de Policía Municipal (central jail operated by the Municipal Police) In Nuevo León: Agencia Estatal de Investigaciones de la Procuraduría General de Justicia (Gonzalito) (State Investigations Agency, Office of the State Attorney-General, known as “Gonzalito”) Policía Municipal Alamey (Alamey Municipal Police) In Oaxaca: Policía preventiva municipal (Municipal preventive police) Separo Procuraduría General de Justicia (jail maintained by the Office of the State Attorney-General) Fuerza Policial de Alto Rendimiento (arraigo) (High-Yield Police Force, arraigo detention facility) The delegation visited seven prisons In Mexico City: Reclusorio Oriente (Oriente Prison) In the state of Mexico: