Objective. This research seeks to demonstrate the inexistence of a regulation or written procedure that allows the correct application of the figure of effective cooperation by the investigator, called in our legal system Prosecutor's Office, an agency that according to the provisions of the Constitution of the Republic of Ecuador and the Organic Code of Criminal Integral, is responsible for conducting the pre-procedural and criminal procedural investigation. In addition to verifying whether the information, data, instruments, or effects provided by the informant is real and reliable to allow the investigator to prevent the consummation of a crime or to discover the perpetrators or accomplices of the offense after it has been committed, to ...