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.

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.

Creates the Washington domestic violence risk assessment work group to study how and when risk assessment can best be used to improve the response to domestic violence offenders and victims and find effective strategies to reduce domestic violence homicides, serious injuries, and recidivism that are a result of domestic violence incidents in the state.