The Washington State Patrol has announced plans to implement DUI emphasis patrols throughout King County over Halloween weekend. The specific patrol information can be found at watikileaks.
On Friday, October 28th through the early morning hours of Sunday, October 30th, additional DUI patrols will be present throughout all of King County. Additionally, there will be specific emphasis patrols in Kent, Washington, starting Saturday, October 29th at 8:00 p.m. through Sunday morning at 4:00 a.m. as well as a Seattle DUI emphasis patrol in the downtown area during the Seattle Seahawk game on Sunday, October 30th.
No other specific DUI emphasis patrols have been announced as of yet in any other county during the month of October.