Does Anyone Out There Have a Family Member That Is Battling With Drugs/alcohol and Drug Dealing ?

My 25 year old (younger) brother has been in jail many times. He can’t handle alcohol and does drugs at times and even sells them at times. He says he’s addicted to that kind of lifestyle. He doesn’t work and doesn’t have a license to drive until he takes a class because he has a couple of DUIs and recently totalled three vehicles in a 5 week period. He’s cost my parents so much money and grief and heartache. He has a grim outlook for life and needs help…desperately. He won’t go to the local rehab center again. He’s been before. He gets violent when drinking or on drugs. He yells and cusses you and calls you the worst things you’ve ever heard. His mind is deranged when he messes with substances. He is gentle and loveable and comical when he’s not messing with that stuff, but those good times are rare. We had to throw him out of the house recently and I am scared of him now. It’s awful to be afraid of your own brother. is anyone else going through this and how do you handle it