psychopathic personality

There must be proof of a 'habitual course of misconduct in sexual matters' on the part of the persons against whom a proceeding under the statute is directed, which has shown 'an utter lack of power to control their sexual impulses', and hence that they 'are likely to attack or otherwise inflict injury, loss, pain or other evil on the objects of their uncontrolled and uncontrollable desire'. These underlying conditions, calling for evidence of past conduct pointing to probable consequences, are as susceptible of proof as many of the criteria constantly applied in prosecutions for crime.