I wouldn't be totally surprised if this is true. The police here have gotten much more stealth in the past 2 years. I was on highway 16 coming back from Gig Harbour and I had an unmarked explorer box me in just as a cop came up behind me. He pulled over in front of me, then left when the cop got my papers.
Have you seen a white Volvo patroling I-5 in area of Tacoma and somethimes Seattle, and Green Suburban right off I-405 going south on 167?