Brother is disabled, an alcoholic and a danger. Is there a residential program he can be forced into?

Amen to that. Unless there are grounds for guardianship or he is very directly and immediately endangering himself, the answer to your question may be no. What is his disability exactly? There are companies that help families stage an intervention. He could die for what he is doing, many people do every year. And an Alanon group or meeting for you could help.

How old is your brother? Where is he doing this? Is he in your parents home or your home? How long has this been going on? If he is not a danger to himself or others usually the law won't get involved. If you were able to have him held for observation it's usually just for a few days and then what? I know it's difficult to see someone self destruct but hard to force people to do things they don't want to do.