The diagnostic evaluation
A state-approved treatment agency must evaluate the petitioner and file a recommended plan with the court. The strength of that evaluation shapes whether the court grants the petition and how the case holds up later.
Offered a deferred prosecution? What five years of supervision actually asks of you
For anyone out on release after a Washington impaired driving arrest, trying to work out who to call before the arraignment
Washington law permits a person to receive a deferred prosecution only once. Using it on a minor or defensible case leaves nothing in reserve for a later, more serious arrest.
Two years of treatment
The treatment plan itself runs about two years, starting with intensive outpatient sessions and tapering into long-term group attendance and monitoring.
Five years of jurisdiction
The court keeps jurisdiction for five years from entry, and the charge is dismissed only at the end of that period. Finishing treatment early does not end the supervision.
Consider a driver stopped on a Tuesday night in a King County suburb, breath tests well above the limit, a prior alcohol-related conviction from a neighboring county six years earlier, and an arraignment calendar that moves too fast to think on. The prosecutor's first offer is a plea with jail alternatives and an interlock requirement. A second option appears in the file: a petition for deferred prosecution, the treatment-based resolution written into Washington law, which ends in dismissal if everything holds. It sounds like the better door. It is also the door that closes behind you for five years, and the careful reader spends an afternoon on the paperwork before deciding.
1. Read what the petition actually asserts about you
The petition is not a denial. It states, under oath, that the conduct charged was the result of alcoholism, drug addiction, or a mental health condition, that the condition is likely to recur without treatment, and that the person wants treatment. A state-approved agency performs a diagnostic evaluation and files a recommended plan, and the court decides whether the plan is adequate. A careful reader checks whether the evaluation actually supports the diagnosis being alleged, because a thin evaluation is the thing most likely to unravel later, and because the assertion cannot quietly be walked back once the file contains it.
2. Count the two-year program inside the five-year clock
The treatment obligation is intensive and front-loaded: a structured outpatient course lasting two years, with an initial phase of frequent sessions, then a long tapering maintenance schedule of group meetings and monitoring. The court's jurisdiction, though, runs five years from the date the petition is granted, and dismissal comes at the end of that period, not at the end of treatment. Years three through five are quieter but not empty, since abstinence, reporting, and compliance continue. The Substance Abuse and Mental Health Services Administration is the federal body responsible for standards in this treatment field, and the agency you enroll with should hold current state approval.
3. Understand the stipulation you sign on day one
Entry requires waiving the right to a jury trial, waiving speedy trial, and stipulating that the police reports and the state's evidence may be used to determine guilt if the deferral is revoked. Revocation is therefore not a return to a fightable case; it is a short hearing followed by a finding on the stipulated record, with sentencing to follow. Read the stipulation line by line and ask which specific documents it incorporates. A driver whose stop or breath test has a genuine suppression issue is signing that issue away, permanently, in exchange for the treatment track.
4. Check what it does not erase
The Department of Licensing administrative action against the license proceeds on its own track and is not resolved by the petition. Ignition interlock requirements generally attach anyway. A deferred prosecution counts as a prior offense for sentencing purposes if there is a later arrest, and the statute permits only one in a lifetime, so it is a resource spent, not a rule bent. It also becomes irrelevant as protection the moment it is revoked. The dismissal at year five is real and worth having; the accurate way to hold it is as one outcome among several, not as an escape hatch.
5. Ask who it genuinely fits
It fits the person with a real, documentable dependency who intends to treat it regardless, who is facing a second or third offense where mandatory jail is otherwise on the table, and whose case has no meaningful suppression issue. It fits poorly the first-time reader with a defensible stop who is being steered toward a five-year commitment because it is administratively easy. Between those poles sits most of the docket, which is why the evaluation, the driving record, and the discovery all have to be read together before anyone signs.
6. Price representation against the whole five years
A flat fee that covers arraignment and entry of the petition is not the same as counsel who will still take the call in year three when a monitoring lapse triggers a compliance hearing. Ask directly what the quoted fee includes: review of discovery before the recommendation, negotiation with the prosecutor over conditions, the entry hearing, and representation at any revocation proceeding. Ask what a revocation hearing costs separately if it is excluded. The treatment program's own cost is a distinct expense, sometimes partly covered by insurance, and worth confirming with the agency in writing before enrollment.
The decision is best made with the evaluation, the discovery, and the fee agreement on the same table, read in that order, with a week rather than a morning to think it through.
Entry requires agreeing that the police reports may be used to determine guilt if the deferral is revoked. Revocation leads to a finding on that record rather than a trial.