The DUI Stop in Seattle: What Happens After Police Pull You Over

Most DUI cases in Washington begin with a traffic stop. Understanding what police must legally establish during that stop can be critical to building a strong defense.

If you were recently stopped for suspicion of DUI in Seattle, the legality of the initial stop and subsequent investigation may directly impact your case.

How DUI Traffic Stops Begin

Under Washington law, an officer must have reasonable suspicion that a traffic violation or criminal offense has occurred in order to initiate a stop.

Common reasons for DUI stops include:

  • Speeding or lane violations
  • Failure to signal
  • Driving without headlights
  • Erratic driving behavior
  • Checkpoint or emphasis patrol stops

In serious accident cases, officers will typically evaluate all drivers involved for signs of impairment.

If a stop was not legally justified, evidence obtained afterward may be subject to suppression.

What Officers Look for During a DUI Investigation

After a vehicle is stopped, officers are trained to observe signs of possible impairment, including:

  • Odor of alcohol or marijuana
  • Red or watery eyes
  • Slurred speech
  • Slow or confused responses
  • Open containers or visible drugs

These observations are documented in police reports and often supported by body camera footage.

Field Sobriety Tests (FSTs)

Field sobriety tests are physical and cognitive exercises conducted roadside before arrest. Standardized tests may include:

  • Horizontal Gaze Nystagmus (eye test)
  • Walk-and-turn test
  • One-leg stand test

These tests are designed to assess coordination and divided attention skills.

Performance can be affected by factors unrelated to alcohol or drugs, such as medical conditions, fatigue, weather, or nervousness.

Chemical Testing and Implied Consent

Washington's Implied Consent Law requires drivers lawfully arrested for DUI to submit to a breath test. Refusal can result in automatic administrative license suspension and may be used as evidence in court.

Chemical tests include:

  • Breath testing (most common in alcohol cases)
  • Blood testing (typically used in drug-related cases)

Portable breath tests (PBTs) used roadside are different from evidentiary breath tests conducted after arrest.

After the Arrest: What Happens Next?

After arrest, a person is typically booked into jail and may be released on bail or bond.

You have only 20 days from the date of arrest to request a Department of Licensing hearing to challenge administrative license suspension.

Your first court appearance will be an arraignment, where a plea is entered and future court dates are scheduled.

Why the DUI Stop Matters

Every DUI case begins with the stop. If police lacked reasonable suspicion, probable cause, or failed to follow proper testing procedures, critical evidence may be challenged.

Defense strategies often focus on:

  • The legality of the initial stop
  • Whether field sobriety tests were administered properly
  • The accuracy of breath or blood testing procedures
  • Constitutional violations

Seattle DUI Defense Attorney

Attorney Steve Karimi is a former Washington prosecutor who understands how DUI investigations are conducted and how to challenge them effectively.

If you have been stopped or arrested for DUI in Seattle, contact our office immediately for a confidential consultation.