Just found out my little brother(18yo) has schizophrenia, I haven't seen him in about a year, I just moved back. He lives with his grandma, and he got kicked out of school for wanting to shoot up the school! He keeps begging me for a gun because he feels he is unsafe, I refused to get him a gun so now he wants a pocket knife and pepper spray. Is this safe for him to have? I've seem some posts about delusions could someone explain how these work. Sorry so long this is all new to me, he seemed like he was ok before I moved, I feel like this is my fault and I don't know how to help.