Forensic Psychology is said to have been born in 1908, with the studies of the doctor, doctor in Psychology, Hugo MÜNSTERBERG (27), when he published his work entitled: On the witness Stand (1908), in which he indicated that in relation to the verbalized testimony of a witness, nothing more than subjective and partial truth could be obtained. And the questioning of the lawyer seemed useless as a primary strategy to extract the objective truth from the witness. And he proposed that Psychology should carry out this part of the investigative work using scientific techniques and instruments that could "objectify" the subjectivity of the witness and his memories.Se dice que la Psicología forense nace en 1908, con los estudios del médico, doctor en Psicología, Hugo MÜNSTERBERG(27), cuando publica su obra titulada: En la posición del testigo (On the witness Stand, 1908),en la que indicaba que en relación al testimonio verbalizado de un testigo, no se podía obtener nada más que una verdad subjetiva y parcial. Y le parecía inútil el interrogatorio del abogado como estrategia primaria para extraer la verdad objetiva del testigo. Y propuso, que la Psicología debía realizar esa parte del trabajo investigativo mediante técnicas e instrumentos científicos que pudieran «objetivar» la subjetividad del testigo y sus recuerdos.