How will it affect my child if I legally change my last name?

For information on name changes in King County, see https://www.kingcounty.gov/courts/district-court/name-changes.aspx

In a dissolution of a marriage, Washington State courts are supposed to make an "equitable" division of property. See...

Will a judge seen my child's mothers therapist, as a neutral credible witness? FCS already has. I was never a patient of his.

You should retain an attorney. The bias of a witness can be a crucial point.

Why is this the case?

See https://app.leg.wa.gov/RCW/default.aspx?cite=26.27

Why is this the case?

See https://app.leg.wa.gov/RCW/default.aspx?cite=26.27

What legal authority is there for terminating child support for 21 yr. old still working towards high school diploma?

Make a petition to modify. http://www.courts.wa.gov/forms/?fa=forms.contribute&formID=8 See...

If a child under 15 swings a metal bar at an adult and the adult punches the child what will happen to said adult?

See https://app.leg.wa.gov/RCW/default.aspx?cite=9A.36. The parties can also sue each other for assault and battery. Honegger v. Yoke's, 83 Wn....

IS it legal to put cameras up in my children's bedrooms in washington?

Your statement looks like a creepy idea.

Why is this the case?

Maybe you should write to your congressional representatives and senators.

Do I need to pay 45% of travel expenses when there is a lot of back child support owed to me?

If your ex has failed to pay in accordance with a court order regarding child support, you should make a motion to the court to have him held in...