He is definitely depressed but has some unusual symptoms: changes facts and believes his distortions of reality, then uses these changes to verbally attack family members claiming that they have lied to him. he also belittles us every chance that he gets adding distortions of facts to make his case. He is demanding of people who were hired to take care of our parents affairs. Tells them that they are not lawyers and do not understand our parents Trust. ( These people are professionals. This is their business. ) He claims that they are wrong and will not accept their explanation. He has made an enemy of our parents lawyer by telling her that she is a lier. He has convinced his wife that if he dies, she will be cut out of the Trust, which is not true. He calls our Mother, who is not mentally incompetent, and upsets her by telling her that I and my siblings plan to cut him and his family out of his inheritance. He contradicts himself frequently ( have it in emails.) He has been under extreme stress, in recent years, that he has had no control over. Currently there are days that he can t make himself get out of bed. His wife says that he is seeing a psychiatrist and taking antidepressants, but I wonder. HIs wife doesn t see anything wrong with him except depression. He has convinced her that he is so smart that he knows more about the Trust than the lawyers who wrote it. ( Actually, he has said that the lawyers who wrote the Trust was senile. This lawyer was one of the lawyers who wrote the Trust laws in this state. ) As you can tell, It is hard for me to verbalize my brother s mental state. Some of his spiteful behavior started years ago, but it has become much worse over the last year or so. I feel that something more than depression is going on, but I can t figure out what it is. I would like to understand what is going on with him and find out if there is any chance that he could become dangerous.