DUI/Impaired Driving

Impaired driving is a leading factor in Washington traffic deaths. The Washington State Patrol’s Impaired Driving Section runs and agency’s: Breath Test, Drug Evaluation and Classification, Standardized Field Sobriety Testing, Ignition Interlock and Traffic Safety Resource Prosecutor Programs, and Mobile Impaired Driving Unit. To learn more about the services they provide, please visit the pages listed below.

Breath Test Programs

The Breath Test Program (BTP) manages, maintains, and certifies the calibration of more than 220 evidentiary breath testing instruments in the state. Here you can view public records (including Datamaster database records), signed affidavits and repair certifications, standard operating procedures, and curriculum vitae. To access these records, click here.

Drug Evaluation and Classification

The Washington State Patrol coordinates the Drug Recognition Experts program for the State of Washington. A Drug Recognition Expert is a law enforcement officer trained to recognize impairment in drivers under the influence of drugs other than, or in addition to, alcohol. Many law enforcement agencies in the state of Washington participate in the Drug Recognition Expert program. Forms and manuals related to the Drug Recognition Experts are available here.

Ignition Interlock

The Washington State Patrol regulates the ignition interlock industry, through legislative mandate, and certifies ignition interlock manufacturers to conduct business in Washington. This program also monitors ignition interlock installers by conducting annual onsite audits to verify the devices are being calibrated and installed under state guidelines. Citizens, required to have the device installed, are subject to random compliance checks and review of their individual device’s database. To visit our Ignition Interlock Program page, please click here.

Mobile Impaired Driving Unit

The Mobile Impaired Unit is a self-contained 36-foot motorhome that has been turned into a mobile DUI processing center and incident command post. When requested, the MIDU travels across the state in support of law enforcement efforts during DUI emphasis patrols or to emergency incidents such as wild land fires or other natural disasters. It’s a full service police station on wheels. For questions or to request the MIDU for an event, please contact the MIDU State Coordinator via email:


  • Headquarters

    Section Headquarters – Seattle
    Impaired Driving Section – Washington State Patrol
    811 E Roanoke St.
    Seattle, WA 98102-3915
    (206) 720-3018

    Section Commander
    Lieutenant Rob Sharpe
    (206) 720-3018, Ext. 24105

    Events and Training Coordinator
    Ms. Rebecca Cortez
    (206) 720-3018, Ext. 24126

    Public Disclosure Coordinator
    Ms. Terra Shin
    (206) 720-3018, Ext. 24108

    Mobile Impaired Driving Unit Coordinator

    DRE/SFST State Coordinator
    Sergeant Mark Crandall
    (206) 720-3018, Ext. 24121

    Ignition Interlock Program

    Breath Test Program Supervisor for Districts 2, 3, 4, 6
    Sergeant Dave Divis
    (206) 720-3018, Ext. 24119

    Breath Test Program Supervisor for Districts 1, 5, 7, 8
    Sergeant Bruce Maier
    (206) 720-3018, Ext. 24119

    Breath Test Program
    Shelley Benante
    (206) 720-3018, Ext. 24104

  • District 1 - Tacoma & Tumwater

    Trooper Al Havenner
    Impaired Driving Section
    2502 112th St E
    Tacoma, WA 98445
    (253) 538-3143

    Forensic Scientist Ruth Cramer 
    Impaired Driving Section
    222 Tumwater Blvd, Bldg 16
    Tumwater, WA 98504-2640
    (360) 586-1516

  • District 2 - Seattle

    Impaired Driving Section
    811 E Roanoke
    Seattle, WA 98102-3915

    Trooper Keith Lentz
    (206) 720-3018, Ext. 24138

    Trooper Mike Qunell
    (206) 720-3018, Ext. 24109

    Trooper Jim VanDiest
    (206) 720-3018, Ext. 24106

  • District 3 - Union Gap and Kennewick

    Impaired Driving Section
    2715 Rudkin Rd
    Union Gap, WA 98903

    Trooper Mel Sterkel
    (509) 249-6716
    Impaired Driving Section
    143302 E Law LN
    Kennewick, WA 99337

  • District 4 - Spokane

    Impaired Driving Section
    W 6403 Rowand Rd
    Spokane, WA 99224

    Trooper Jon McKee
    (509) 227-6615

  • District 5 - Vancouver

    Impaired Driving Section
    11018 NE 51st Circle
    Vancouver, WA 98682-6686

    Trooper Trevor Downey
    (360) 449-7916

  • District 6 - Wenatchee

    Impaired Driving Section
    2822 Euclid Ave
    Wenatchee, WA 98801

    Trooper Tom Moberg
    (509) 682-8118

  • District 7 - Marysville and Burlington

    Impaired Driving Section
    2700 116th Street NE
    Marysville, WA 98271-9425

    Trooper Cameron Birman
    (360) 739-1277

  • District 8 - Poulsbo

    Impaired Driving Section
    22065 Viking Way NW
    Poulsbo, WA 98370-0451

    Forensic Scientist Bill Bogen
    (360) 473-0300 Ext. 85122