from:
http://research.lawyers.com/Washingt...ton-State.html
In Washington, under some circumstances, you may be able to have a criminal record expunged, which means that the records are sealed or destroyed and can only be obtained in limited circumstances, such as a future criminal prosecution.
You may be eligible for expungement if:
- You have completed your sentence, and
- You were convicted of a nonviolent offense, and
- You have spent a specific amount of time (from two to 10 years, depending on the seriousness of the offense) in the community without any criminal convictions.
If you qualify, you may file a motion with the court to vacate your conviction. If the court grants the motion, the record of your conviction will be vacated, sealed, or destroyed. If you are arrested but not convicted, you may ask the Washington State Patrol to expunge your arrest records. Also, a person who has a juvenile record and is now at least 18 may be able to ask the court to destroy or seal the records.