Washington Field Sobrity Tests - Just say no.

Field sobriety tests are not required by Washington State law.  Regardless of why you are pulled over or the officer's suspicions, you are under no obligation to take these tests.  If you have been pulled over by Snohomish County law enforcement, or by any other law enforcement agency in Washington State for that matter, you have an absolute right to refuse to submit to any field sobriety tests, and you should refuse to take them.  Be polite, but firm.