My brother-in-law is a heroin addict. He’s dying. What more do you want?
Heroin is illegal, it is the illegality that is likely to have placed your brother in more danger. Society does not learn how to handle addictions to drugs that are made illegal. If you wanted to really help others who in the future would be trapped in your BIL’s tragic state, you’d be pro-legalization, in my considered trust-the-people-more-than the-nanny-state opinion