There are some similarities between the system of leniency on admission of guilt and acceptance of punishment and plea bargain,such as the prosecutorial discretion is expanding,and the vindictive prosecution is arising in plea bargain,to restricting this vindictive prosecution which disobey the due process,a kind of defense named vindictive prosecution defense was developed.Now,the danger of retaliating defendant who refuses to plead guilty,is objectively exist in the system of leniency on admission of guil...