Guardianship

Location: Missouri

I’m hitting a dead end. I want to file for emergency guardianship of my sibling who is a minor. I have so many questions that I need answered on how to do things and ensure the best possible outcome for this situation, but I keep hitting a dead end. What subcategory of lawyers am I looking for? I am not getting a divorce. I am not planning a will or estate document. I am not filing for a restraining order. Whenever I research to find specific firms near me that could possibly get me in for a consolation, none are describing specialties in this specific category.

Question: What type of lawyer/ firm deals with guardianship of a minor when it does not involve a divorce or death of a parent?