How do i crush a psychopaths ego?

ok i met this creep over the internet then met him in rl but he got violent with me and was sent home far away so he is a psychopath and has been stalking me online because he is mad he had to go home and he tries to get his friends to stalk me so my question is how do i crush his ego and humiliate him so badly that he will be too scared to mess with me and will drop contact with me this guy has a history of schizophrenia and is not on meds for it and he fits the diagnosis of psychopath perfectly he has a history of depression as well is there anything i can use against him to make him so humiliated that he will drop stalking me online and move on?