Depending on one's perspective, this may be a response to domestic violence or another chapter in a campaign of parental alienation. Either way, it probably doesn't work.
In this case, the mother got a one-year-long domestic violence protection order against the father in San Juan County, Washington. She then left Washington for Montana. The father followed her a few months later.
While the parents were living in Montana, the domestic violence protection order in Washington expired and jurisdiction ripened in Montana. Simultaneously, the parents renewed their custody battle in Montana.
Over a year later, the mother returned to Washington and obtained a new domestic violence protection order against the father. The father, who was still in Montana, then petitioned the Montana court for a restraining order and an interim parenting plan. The mother did not return for the hearing. The Montana court then adopted the father's interim plan, ordered the children back to Montana, and found the mother in contempt.
To enforce the Montana order, the father obtained a writ of habeas corpus from the court in Washington. The mother complied with the writ and returned with the children to Montana. However, during Christmas vacation, she took the children back to Washington and took up residence in a battered women's shelter in King County, Washington.
The father then obtained a second writ of habeas corpus, but the writ was never enforced. The mother, meanwhile, filed for an interim parenting plan. The Washington Court then held a hearing to determine which state had jurisdiction.
The issue at the hearing was which state had jurisdiction (in the language of the Uniform Child Custody Jurisdiction and Enforcement Act, which state was the home state) -- Washington, based on the original residence of the children, the expired domestic violence protection order, and the second domestic violence protection order, or Montana, based on the residence of the children when the interim parenting plan was entered.
The Washington court held that jurisdiction lay in Montana.
The original residence of the children was no longer operative because domicile had changed; the expired domestic violence protection order did not confer jurisdiction because it had expired; and the new domestic violence protection order was invalid to start with because the court never had jurisdiction to issue it. Therefore, the home state, Montana, had jurisdiction.
Moving across state borders to prevent your ex-spouse from seeing the children is not a winning strategy. If you are facing domestic violence problems, renewing your existing domestic violence protection order is going to be much cheaper, and probably more effective, then flight.