Ball & Gillespie is the oldest private polygraph company in
Western Washington, operating continually for 32 years. It was opened in 1974 as "Gillespie Polygraph" by Dewey Gillespie
soon after his retirement from the Seattle Police Department. Between 1974 and 1986, Dewey Gillespie operated the business
with the help of other retired police examiners.
In 1986, Terry J. Ball bought Gillespie Polygraph upon Dewey Gillespie's
final retirement to Arizona. Terry Ball has been operating the business since 1986 with the help of other professional polygraph
examiners. Ball & Gillespie Polygraph offers professional polygraph services to law enforcement agencies, private attorneys,
private businesses, and private citizens.
Our professionally trained examiners and our state-of-the-art
equipment guarantee that you will receive the very best polygraph examination here at Ball & Gillespie Polygraph.
Don't settle for a poorly trained, inexperienced polygraph "operator" who will offer you discounted prices. When you
need "only the very best" call Ball & Gillespie Polygraph.
We are proud members of the following organizations:
Northwest Polygraph Examiners Association
American Polygraph Association
National Polygraph Association
American Association of Police Polygraphists
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