Not if the parents are fit. As a step parent you have no legal right to the children but if no one else have them and you have a close relationship with them there is a chance.
No, unless a custody order is being violated, it is not kidnapping for the Father to move out of state with his own children.
Their biological father.
Custody of children is decided upon in court. The judge will set a schedule for the parents, so the out of state parents will spend adequate time with their children.
Missouri
Why is the child in state custody?
The mother. The father have to prove paternity in court and petition for visitation or custody. He can then also pay child support.
If you were never married to the father of the child(Children) custody HAS NOT been established. You must go to court and have custody determined. My child lived with me for 5 Years. The father paid support to the state of Missouri Which I entern received, and he visited on occasion. One weekend he picked her up for a visit and disappeared. No one would help because custody was never established. He had just as much right as I.
Regardless of your state laws, the father can still file an injunction.
Not if the mother still have custody. He better have a good explanation to tell the judge why he has not seen his child for a year. If he has a good reason they would probably start with visitation. Full custody he can not get unless the mother is unfit.
It depends on the state, usually the state takes the children into custody, or the closest family relative.
It depends on the state the father lives in, the custody laws of that state would determine if he had a real, legal reason for taking the children for her. Another condition would be WHY she was incarcerated. He would need to see a family lawyer who practices family law in his state.
Get can't without the permission of the court. File an injunction.