Can an older sibling have younger sibling live with them?

My little brother, who is 15 in October, is living with our father. He has full custody. He is a good provider but, there is the issue of he moves around a lot due to his job. He is a crane operator. My little brother wants to live in one place so he can make friends in high school and so he does not have to stay in a motel as well. My father agrees with the idea with my little brother living with me. The issue is our mother is on drugs but has not been arrested or caught. She lives about an hour from me. We are worried she will try to show up at my house one day and take my little brother from me. She has only contacted him once in the past two years of him living with my father. I have not spoken to her in over a month, and I also have no clue exactly where she lives. We just fear her trying to remove him from my home. I have two jobs, and I am going to college. One job I work out of the home so I can spend time with my little brother. I have a roommate who helps pays bills. My father can easily help me financially if there is ever an issue. Is there any way we can have custody between my father and I or my father keep custody and him live with me and my mother not being able to take him away from us.

Sorry, but you have no legal rights to any of this.

It's up to your father. If he's OK with your brother staying with you then you'll just have to take your chances with your mother.

DCC1998 said:

We are worried she will try to show up at my house one day and take my little brother from me.

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For starters, how old are you? Second, is there a legitimate concern that your mother could physically overcome you and take possession of your brother against his and your will?

DCC1998 said:

Is there any way we can have custody between my father and I or my father keep custody and him live with me and my mother not being able to take him away from us.

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If, as you said, your father "has full custody," then it is entirely up to him to decide where your brother lives, and your mother gets no say. If your father decides that your brother lives with you, then that's that. If your mother shows up, turn her away. If she causes trouble, call the police. Might be a good idea for you to have a copy of the custody order and something in writing from your father authorizing your brother living with you.