Hey guys, been lurking at the forums and I finally registered because I found that there's a lot of good people and good discussions here. The following will be a long story, so please bear with me.

I live with my very elderly father and older brother. My father is retired with very little money and my older brother quit his job about 6-7 years ago when I was still in college. Since then I've graduated and earlier this year have only gotten a job. My brother however, has no education, stays at home and has zero discipline and basically harasses my father with his anger and insults on a daily basis. He wakes up at any hour and is either on the internet of playing his PS4. He has zero real life friends. He is grandiose and believes he is better than anyone around him.

He was diagnosed with Bipolar Disorder a few years ago but has never followed up with any treatment, counselling or medication. He threatens me and my father verbally and sometimes physically as well. He makes unreasonable demands such repeatedly asking money that we don't have or wanting to buy things we can't afford. Our relatives have stayed away and refuse to communicate with us anymore because of the stigma and my father is too old, frail and tired to do anything about it.

My questions is, how can I get him to be treated? He is totally out of touch with reality and believes the world is corrupt and people are beneath him, and lives safely in his bubble to form his own warped reality. I heard that I can call the police to pick him up to be forcibly treated, but I am the younger brother, not the legal guardian plus a police car coming to pick him up would definitely be the talk of the town since we live in a small neighborhood. What options do I have?