(Asking for a friend of mine) Please help!! I had seen a post here before that there are lawyers who do pro bono work…

(Asking for a friend of mine) Please help!! I had seen a post here before that there are lawyers who do pro bono work for moms who are trying to get custody of their baby. Can anyone give me any information on this? Also if anyone has gone through a custody issue can u share your experience? FYI she let's him see the baby whenever he wants but anytime he doesn't get his way he threatens to take the baby from her or says it won't go in her favor if she gets a lawyer since she doesn't have papers.