Criminal, civil investigations, technical accident investigation and witness interviewing.

Seattle based agency specializing in background checks, employee screening, theft, surveillance, vehicle tracking, and infidelity. Describes qualifications and experience.

Specializes in corporate security issues. Also offers investigative services.

Spokane based Private investigator that specializes in investigating automotive accidents. Site has information about services offered and contact information.

Private Investigatigation and litigation support for the cities of Vancouver, Washington and Portland, Oregon. Paralegal services also offered.

Full service investigation firm located in the Puget Sound area.

Specializes in custodial disputes, background checks (criminal and civil), and consultation.

Investigative services for criminal and civil matters in Seattle.

Private investigation agency for civil and criminal work in Seattle.

Providing services in Washington State including Seattle, Tacoma and Spokane.

Specializing in legal, insurance, surveillance, infidelity and workmans compensation investigations.

Offer a range of investigative services in Vancouver, Washington, including corporate investigations, undercover assignments, fraud investigations, surveillance, and process serving.

Services include locating and finding people, surveillance, and background checks. Also a price guide, and resource links.

Services include employment screening, skip traces, process serving, video and surveillance.

Professional investigative services firm providing a full range of investigative and protective services.

A Washington State based association for Private Investigators. Their web site features licensing information, press releases, and history of their organization.

Washington State based legal investigator association. Site has information about their organization, membership information, and links to other sites that may be of interest.