Under Washington state criminal procedure does the victim have the right to reopen a closed criminal case?

Victims generally aren't parties to a criminal case and likely has no standing to initiate any action in court in the case.

What is it that you want to do? Do you now recant and has information that is favorable to the defendant? If yes, you can contact the attorney for the defendant.

Do you have more information unfavorable to the defendant? Unless the new information relates to other crimes, the prosecutor likely cannot use the information. You can always give the prosecuting attorney's office a call and see what the prosecutor wants.

If you want the defendant to pay restitution to you, you may be able to bring a civil action against the defendant.

You likely should review your facts and options with an attorney.