<human>: I hate my brother. He has every emotional illness you can name. He has been on hundreds of different medication cocktails his entire life and never really went to school, though he is of average intelligence. 

I don't speak to him, I want nothing to do with him. I'm a very nice person and don't hate anyone -- except him. In truth, I wish badly that he would do something terrible and go to prison forever. 

He lives with my parents, in their late 60s and is a daily, hourly burden to them. Our fear of all these years has ultimately come true, and for the first time he has decided (thanks to his friends at his ultra religious chirstian church) that he does not need medicine. He wants to buy a gun. 

I'm not afraid right now, he's a child mentally, but one day in the future I fear that he will want to find me. I don't want him to be able to know anything about me or my family. I don't want to be searchable in any way for him. What steps can I take to disappear from his life?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: My emotionally disturbed brother is off his medicine, and one day in the future I fear he will be violent and want to find my family. How can I hide forever?