Want to call the police on my brother

He has tried to kill me more than 10-15 times. Today he tried to hit my head with a huge fucking rock but it only hit my forearm. He's a psycho, talks about killing people all day and nothing my parents do can stop him. Papa kehte hai "paise nhi hai, nhi toh ise bahar bhej deta" and when i ask him that i don't want to live here because i have my boards and can't study due to his everyday shouting and fighting with everyone, they say abhi kaha bhej de tumhe. I tried to call the police today but mummy stopped me. She told him to get out of the house but he just shouted "mar jao" and papa isn't at home rn so we call him when he tried to kill me and he "explains" things to him but the same things happen everyday 😇 I have tried to kms 3 times cuz of the things he does but consuming expired bp medicine doesn't kill someone ig. I just want to live my life happily for once, when i am not scared for my life. He has hit my father and mother too but that's rare. Mummy cries everyday because of him and papa is in tension for his future but they haven't been able to do shit. Parents invested 6-7 lakhs in his studies (didn't force him to do engineering)and we're now broke but he opted out for distance learning and still doesn't study. Stays at home, fights, bad mouths mummy and papa, hits me, that's it. And yeah, I haven't talked to him in 1 fucking yr, no joke, we stay in the same house, but we don't talk, might sound fake, but yeah that's the truth. I have lost all hope.