Derik Zimmel owns True North Polygraph and administers the tests for some of the country’s largest fishing events, including the National Walleye Tour and Masters Walleye Circuit Derik Zimmel of Grand ...
The polygraph is not a lie detector but rather an instrument that measures a person’s physiological changes to questions posed by the examiner. An elevated physiological response to a particular ...
Nov. 11—GRAND FORKS — When Derik Zimmel started his polygraph business in 2009, he didn't anticipate that fishing tournaments would become an important part of his workload. They have. "I had hoped ...
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