Conventionality control, is implemented by the Inter-American Court of Human Rights, by which a judge of a subscriber to the American Convention on Human Rights country, directly applied the inter iure corpus, when local standards differ the same medium. This system, in the case of criminal proceedings, and specifically in the field of preventive detention, said that the purpose to deprive the human right of individual freedom and thus affect the presumption of innocence, should only serve procedural purposes, such as preventing obstruction of justice and the risk of leakage, and stating explicitly that purpose as the danger to the community It does not serve the preservation of the process but a punitive order, which goes against the American Convention on Human Rights. In the systematic Colombian criminal procedure, there are three purposes without differentiating on procedural or not, so two standards in force are presented, having resorted to conventionality control and pro persona principle, looking standard that protects most to be human in their rights to liberty and the presumption of innocence, when imposing a security measure.