My question involves criminal law for the state of: Washington

I am desperate to find a legitimate answer to this question. Even if someone can just point me to a good law website that I can do my own research I would appreciate it greatly!

In the case of someone taking a plea bargain in which the charges end up being 2 counts of Class 4 non-felony assault, given 2 years of supervised probation. They were told when signing the plea that it was transferable to another state, in which this person is having a child very soon. After signing such plea, he is now being told that it may or may NOT be approved for transfer and will take up to 4 months. The question is this: if, for some absurd reason they do not find having a child that you want to raise a good enough reason to transfer your case to another state, if you were to just leave and make the move anyway, what are the repurcussions? If pulled over in the other state for a tail light or something, will there be a warrant outside the home state of the charges? Would they really extradite someone over 1500 miles for such charges?

I know this is a tricky question for someone to answer, but it involves a baby girl who might miss out on knowing her father for the first 2 years of her life, who so desperately wants to be there for his baby. It's worth it for him to be there, even illegally if he must. He has no prior record of any kind, and it was a stupid mistake where he let someone get the best of him.

Again, any help with this question would be greatly appreciated, even if it's just a good website I can use! Thanks so much.