If the murder case can never be solved, and the murderer will be popular and spicy outside all his life, is there nothing the law can do?

As the old saying goes, it's hard to be outside if you don't get caught. Be on tenterhooks every day, be careful, you may be scared. The law is not powerless. It's just that under the existing conditions, they may not use their own information to do things, which may not be easy to check. Once they use their real information, I think they will definitely be caught.