Modifies domestic violence provisions relating to: (1) Offender scores for assault of a child and criminal mistreatment; and

(2) Revising the crime of fourth degree assault.

Requires a biological sample to be collected for purposes of DNA identification analysis from an adult or juvenile convicted of assault in the fourth degree, where domestic violence was pleaded and proven, or an equivalent municipal ordinance.

Authorizes a sheriff to waive fees associated with service of a writ of habeas corpus that was issued for the return of a child when the person who was granted the writ is, by reason of poverty, unable to pay the cost of service.

Requires the administrative office of the courts, through the Washington state gender and justice commission of the supreme court, to convene a work group to address the issue of domestic violence perpetrator treatment and the role of certified perpetrator treatment programs in holding domestic violence perpetrators accountable.