Wash. R. App. P. 16.27
Before or after the filing of a personal restraint petition, a person under sentence of death may file a motion for investigative, expert, or other services. Such a motion shall be granted only if the person establishes facts that give rise to a substantial reason to believe that the services will produce information that would support relief under RAP 16.4(c), and if the legislature has authorized and approved funding for such services. The motion shall be directed to the Supreme Court and may be made ex parte. Upon a showing of good cause, the moving papers may be ordered sealed by the court and shall remain sealed until further order of the court. Services may be allowed for preparation of a second or subsequent petition attacking the same judgment and sentence only upon a substantial showing that the petition is not barred by chapter 10.73 RCW or RAP 16.4(d).
Wash. R. App. P. RAP 16.27