Expert Witness Services in Seattle

Washington state courts evaluate expert testimony under ER 702 and apply the Frye general-acceptance test to novel scientific evidence. That is a materially different inquiry from the federal reliability analysis, and it rewards different emphasis in a report.

Frye asks whether a theory or technique has achieved general acceptance in the relevant field — a question about the standing of the method rather than about the rigour with which this particular expert applied it. For construction, claims-handling and clinical standard-of-care testimony the distinction is usually academic, since none of that is novel science.

It becomes decisive where a causation theory depends on a mechanism contested within the literature. The drafting response is to establish the acceptance explicitly where it exists, and to acknowledge in the report where it does not, rather than allowing the point to emerge for the first time on cross-examination.

Construction defect leads: water intrusion, envelope and cladding failure, deck and balcony framing, roofing assemblies, and the seismic retrofit questions the region's older building stock raises. These matters typically need architectural, structural and cost opinions working the same record.

First-party insurance follows, for the reasons above, together with the claims-handling and coverage-position analysis that IFCA and common-law bad faith matters turn on.

The technology and life sciences sector generates a distinct third category — commercial disputes, employment matters, and intellectual property work that calls for forensic accounting, business valuation and economic damages analysis rather than the injury-driven disciplines.

Medical negligence tracks the density of the region's hospital and academic medical systems, addressed by RCW 7.70 and covered on the Washington medical expert witness page.

Seattle federal matters go to the Western District of Washington, sitting in Seattle and Tacoma, with appeals to the Ninth Circuit. Removal changes the admissibility framework from ER 702 and Frye to FRE 702 and the Daubert line — a genuine shift for a contested causation or scientific opinion, since Daubert examines the reliability of this expert's application of a method where Frye examines the standing of the method itself.

It also changes the disclosure instrument. A federal report under FRCP 26(a)(2)(B) is a signed, self-contained document; a CR 26(b)(5) answer is a different instrument at a different level of detail, and serving one where the other is required is a recurring source of avoidable motion practice.

Washington state expert disclosure runs on the case schedule issued in the individual matter rather than a statewide deadline. This site does not calculate any date; the operative order governs.

• King County Superior Court
• W.D. Wash. (federal)

The admissibility standard, expert-disclosure mechanism, and statewide practice that govern every Washington matter are set out on the Washington expert witness page. Federal matters are governed by Federal Rule of Evidence 702 and the Daubert line of authority rather than the state standard.