E/CN.4/1997/7/Add.3 page 26 (e) Judicial complaints against police officials should always be investigated by a body independent of the police body whose officials are the subject of the complaint; (f) Senior law enforcement officials should make it clearly known that the ill-treatment of detained persons is not acceptable and will be dealt with severely; (g) The Legal Medical Institute (Instituto de Medicina Legal) should be autonomous of any authority responsible for the investigation or prosecution of crime; (h) A system of regular visits to all places of detention (police custody, pre-trial detention and post-conviction imprisonment) should be put in place. Its composition should include independent persons of standing and representatives of responsible non-governmental organizations; (i) Extrajudicial confessions should not be admissible as evidence against the person making them or anyone else, other than a person charged with extorting them; (j) A code of practice for the conduct of interrogations by law enforcement officials should be drawn up; (k) Torture and similar behaviour, as contemplated by article 182 of the Penal Code, should be made a criminal offence when inflicted on any person deprived of liberty, not just on those in prisons. The offence should be punished as a grave crime and should have no period of statutory limitation (prescripción ) or, in any event, a period not shorter than that applicable to the gravest crimes under the Penal Code. Provisions regarding the offence of torture should duly take into consideration the standards set forth in the United Nations Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment; (l) The absence of marks consistent with allegations of torture should not necessarily be treated by the public Prosecutors ( fiscales ) and judges as proof that such allegations are false; (m) Nudo hecho proceedings should not be allowed to delay the institution of criminal proceedings against public officials for more than a matter of weeks. In any event, they should be excluded from the period for calculation of any applicable statutory limitation ( prescripción ); (n) The false denial to a representative of the Public Prosecutor's Office ( fiscal ) of a person’s detention or the refusal of that representative's access to a detainee should be vigorously pursued as an act requiring instant dismissal of those responsible for the place of detention; (o) Representatives of the Public Prosecutor's Office ( fiscales ) should be rotated so as to avoid becoming overtly identified with law enforcement or military personnel in a particular locality or place of detention;