This work proposes the direct knowledge of the clinical history of a witness of charge or discharge taken to an accusatory criminal process (Law 906 of 2004) by the defense and the Attorney General of the Nation, without having to go to the previous control by the Judge of Control of Guarantees, in which the classes of witnesses are explained, and the neurological affectation in the human being given by different pathologies, and the causes of taking a person not apt neurologically as a witness.