Article 19 1. No one may be tried twice for the same offence. Anyone against whom such proceedings are brought shall have the right to challenge their legality and to demand his release. 2.  Anyone whose innocence is established by a final judgment shall be entitled to compensation for the damage suffered. Article 20 1. All persons deprived of their liberty shall be treated with humanity and with respect for the inherent dignity of the human person. 2.  Persons in pre-trial detention shall be separated from convicted persons and shall be treated in a manner consistent with their status as unconvicted persons. 3. The aim of the penitentiary system shall be to reform prisoners and effect their social rehabilitation. Article 21 1.  No one shall be subjected to arbitrary or unlawful interference with regard to his privacy, family, home or correspondence, nor to unlawful attacks on his honour or his reputation. 2. Everyone has the right to the protection of the law against such interference or attacks. 13