Skip to content Skip to footer

Toxicology Laboratory Division

Overview

The Toxicology Laboratory Division (TLD) staff includes forensic scientists, property and evidence custodians, and professional office staff who provide the only accredited evidential toxicology services in the state. Law enforcement, medical examiners, coroners, and prosecuting attorneys rely upon the technical expertise of the TLD staff to fully investigate suspicious deaths, natural and accidental deaths, homicides, suicides, traffic fatalities, driving under the influence of alcohol and drugs cases, suspected drug-facilitated assaults and any other forensic cases where alcohol and/or drugs may be involved.

Statistics

Successes of 2019

In 2018, the TLD received a total of 15,676 cases.

The caseload did not change significantly from 2017, primarily due to a decrease in death investigation case submissions.

TLD scientific staff provided expert witness testimony in over 200 cases statewide.

TLD responded in a timely and accurate fashion to 818 complex public disclosure requests.

The TLD successfully maintained accreditation from the
• American Board of Forensic Toxicologists in the area of alcohol and drug testing in biological fluids
• ANSI-ASQ National Accreditation Board (ANAB) in the area of alcohol and drug Testing (ISO 17025)
• ANAB in the area of Breath Alcohol Calibration (ISO 17025)

The development and validation of a new Time-of-Flight LC/MS instrumentation method, will allow the TLD to expand the range of substances that can be screened for in casework.

Additional Information and Resources

For more information on how the Toxicology Laboratory Division manages its case load, please click here.

Contact us

Mailing Address
Washington State Patrol
PO Box 42600
Olympia, WA 98504

Physical Address
Washington State Patrol
Helen Sommers Building
106 11th Avenue SW
Olympia, WA 98501

Wsp accessibility

The Washington State Patrol is firmly committed to providing an environment that provides the public fair and equal treatment and equal access to its benefits, programs and services as required by state and federal laws. If you require reasonable accommodation under the American with Disabilities Act, or would like to file a grievance please click on the following link:  WSP Public Accessibility and Grievance Process

Follow us

© 2025 Washington State Patrol.