N.C. Gen. Stat. § 106-627: Determination of adulteration.

For purposes of evidence under this Article, the grain dealer or his agent, upon receipt or pending receipt of suspected adulterated grain, may, at his discretion, call any law-enforcement officer to verify the sampling technique, [and] origin of sampled grain and subsequently send or request the law-enforcement officer to send the sample of grain in a sealed package to the Department of Agriculture and Consumer Services for inspection and analysis in order to protect only the chain of evidence.

Upon [a] finding by the Department that said sample is adulterated grain, the Department shall notify the grain dealer of the results and return the sample to the original sender in a sealed package. (1975, c. 659, s. 7; 1997-261, s. 66.)