My wife has left the state of Minnesota with our two children without my permission.

I came home from work last wednesday to find the house a disaster and her, the kids, and the dog gone. I immediately called her probation officer, and he said he granted her a 15 day travel permit. She told him her dad was on life support and in intensive care. That was a lie. He since has done nothing. She is presently in California trying to get her probation ended before the 15th so she doesn''t have to return because of that. She has told numerous lies to several people. From abuse, to drugs, to her dad dieing. She has 2 dom. vio. convictions, no me. I took a drug test yesterday to cover my own ass. It will be negative as I dont even take tylenol. I called the police and they told me to go to court. What should I do. What are my legal rights.