Here are some links to information on custody and parental kidnapping the first link gives many links to assist you.
http://www.ncjrs.org/html/ojjdp/jjbul2001_12_2/page8.html
The second includes state specific information so you will know your rights and how to better protect your children and present your case, this is important because of her violations of the order and denial of your parenting time and hiding the children, even the fact that she concealed her presence while attempting to abduct the children, violation of the order and failure to communicate, there is also a section about relatives that I didn't print out. You can also find the laws for Oregon as well
http://findthekids.org/abdbystate.html
Washington Uniform Child Custody Jurisdiction and Enforcement Act:
Revised Codes of Washington:
Custodial Interference in the First Degree:
RCW 9A.40.060
Custodial interference in the first degree.
(1) A relative of a child under the age of eighteen or of an incompetent person is guilty of custodial interference in the first degree if, with the intent to deny access to the child or incompetent person by a parent, guardian, institution, agency, or other person having a lawful right to physical custody of such person, the relative takes, entices, retains, detains, or conceals the child or incompetent person from a parent, guardian, institution, agency, or other person having a lawful right to physical custody of such person and:
(a) Intends to hold the child or incompetent person permanently or for a protracted period; or
(b) Exposes the child or incompetent person to a substantial risk of illness or physical injury; or
(c) Causes the child or incompetent person to be removed from the state of usual residence; or
(d) Retains, detains, or conceals the child or incompetent person in another state after expiration of any authorized visitation period with intent to intimidate or harass a parent, guardian, institution, agency, or other person having lawful right to physical custody or to prevent a parent, guardian, institution, agency, or other person with lawful right to physical custody from regaining custody.
(2) A parent of a child is guilty of custodial interference in the first degree if the parent takes, entices, retains, detains, or conceals the child, with the intent to deny access, from the other parent having the lawful right to time with the child pursuant to a court-ordered parenting plan, and:
(a) Intends to hold the child permanently or for a protracted period; or
(b) Exposes the child to a substantial risk of illness or physical injury; or
(c) Causes the child to be removed from the state of usual residence.
(3) A parent or other person acting under the directions of the parent is guilty of custodial interference in the first degree if the parent or other person intentionally takes, entices, retains, or conceals a child, under the age of eighteen years and for whom no lawful custody order or parenting plan has been entered by a court of competent jurisdiction, from the other parent with intent to deprive the other parent from access to the child permanently or for a protracted period.
(4) Custodial interference in the first degree is a class C felony.
[1998 c 55 § 1; 1994 c 162 § 1; 1984 c 95 § 1.]
NOTES:
Severability -- 1984 c 95: "If any provision of this act or its application to any person or circumstance is held invalid, the remainder of the act or the application of the provision to other persons or circumstances is not affected." [1984 c 95 § 8.]
Custodial Interference, Assessment of costs:
RCW 9A.40.080
Custodial interference -- Assessment of costs -- Defense -- Consent defense, restricted.
(1) Any reasonable expenses incurred in locating or returning a child or incompetent person shall be assessed against a defendant convicted under RCW 9A.40.060 or 9A.40.070.
(2) In any prosecution of custodial interference in the first or second degree, it is a complete defense, if established by the defendant by a preponderance of the evidence, that:
(a) The defendant's purpose was to protect the child, incompetent person, or himself or herself from imminent physical harm, that the belief in the existence of the imminent physical harm was reasonable, and that the defendant sought the assistance of the police, sheriff's office, protective agencies, or the court of any state before committing the acts giving rise to the charges or within a reasonable time thereafter;
(b) The complainant had, prior to the defendant committing the acts giving rise to the crime, for a protracted period of time, failed to exercise his or her rights to physical custody or access to the child under a court-ordered parenting plan or order granting visitation rights, provided that such failure was not the direct result of the defendant's denial of access to such person;
(c) The acts giving rise to the charges were consented to by the complainant; or
(d) The offender, after providing or making a good faith effort to provide notice to the person entitled to access to the child, failed to provide access to the child due to reasons that a reasonable person would believe were directly related to the welfare of the child, and allowed access to the child in accordance with the court order within a reasonable period of time. The burden of proof that the denial of access was reasonable is upon the person denying access to the child.
(3) Consent of a child less than sixteen years of age or of an incompetent person does not constitute a defense to an action under RCW 9A.40.060 or 9A.40.070.
[1989 c 318 § 5; 1984 c 95 § 3.]
NOTES:
Severability -- 1989 c 318: See note following RCW 26.09.160.
Severability -- 1984 c 95: See note following RCW 9A.40.060.
Child custody, action by relative: RCW 26.09.255.
Continued in the next post......