"Most psychologists claim that the control question technique applied in polygraph examinations is based on erroneous assumptions, because control questions do not compensate for the emotions caused by the questions concerning the crime. They maintain that such questions cause an emotional response in an innocent person too, especially when he or she has been arrested in connection with the crime, while passage of time may result in weakening memory traces and emotions caused by relevant questions in an actual perpetrator. The same reservation is formulated by many lawyers. Some polygraphers are convinced that a polygraph examination administered several years after the event is pointless."(...)