<diacritize> However , according to Michel Debout , professor of forensic medicine at the university hospital in Saint - Etienne , the true figure is much higher , as many tend to hide such thoughts because of feelings of guilt . <yor>However , according to Michel Debout , professor of forensic medicine at the university hospital in Saint - Étienne , the true figure is much higher , as many tend to hide such thoughts because of feelings of guilt . 