How would child custody laws work in this case?

My two aunts got into a fight and the one pressed charges on the other on the other one so now they are going to court. The one that started it is the who charges are being pressed against and she has a child. His father is in the miltary in Afghanistan and his fathers parents live a couple of hours away. Also their is my family and my grandma who are in the town of the child. So if the childs mother went to jail who would have custody rights over the child?

My friend got divorced and was in a nasty custody battle she has also been in jail before but it was before she even had her child, it was for public intoxication, but she stopped drinking when she had her child. Her husband threatened her with it and she was scared he would get custody so she looked all over on the internet and she found this place that helped her. I remember her telling me that there was info about grandparents in there too and there rights. I just called her and got the site so here it is if it’ll help. good luck