Hi, i've got a brother which is in my opinion crazy, and physciotic. He's 21, this problem started when he was about 13. As i'm younger than him by 1 1/2 years. While young he would be a sweet person, but just one day when he was 13 it all started. Getting angry, and destroying things. However to be specific and recent, the family went shopping out of town, and we still kind of play childish at times, he stepped on my foot, i tried to slap him back, and in the process he hit me in the nose by accident. To me everything was all fun and game, until he just asked my father for the keys to the car, and just basically destroyed everything that belong to me in the car like a jacket,etc. (It's like destroying this makes him happy and getting back at someone, when hes 21 bare in mind). This isnt the first time in which we've got into problems as such and maybe even worse. I was watching tv one time, and mother came home late was going to buy dinner and didn't, tries to take over me watching, and started throwing plates around the house when mom tried to calm us down, and i hit him first but that was in defense because he threw a plate past me, once that happened it like made him feel no pain like hes on some sort of drug, and wanted to continue fighting like an animal. I had to run to my grandmothers house, and he came over shortly after banging, and neighbors got scared and called the cops. Also when he gets angry he can stay agry for weeks, so on and so forth. I don't know what goes on in his mind, and im afraid that it might end up one day that you see something bad of a family murdered or something. I really don't know what to do or think and feel. Noone has control of him or anything, and even talks disrespectfully at my parents for the things he wants done (my father is watching tv, and hes like "go to your f**ing room". I mean its dangerous the way he is. Ever since his HS ended, he plays his computer almost 24/7, anti-social, hates people for little things done to him, fails or gets really bad grades in college, very demanding, doesnt value money, doesnt have a job, doesnt really care about anything except him and his computer. This is why i think like hes got nothing to lose, that i think will make him to bad things, i dont know how to help this situation or him, and what i can do to protect myself. P.S. I don't know if this is hereditary, because my father does have scitsophrenia (sorry for the spelling).