When organic farmer Brian Grosh was tasered three times in the middle of his cornfield by park rangers with the National Park Service, he called WTTG-TV (Washington, DC) Investigative Reporter Tisha Thompson and Investigative Producer Rick Yarborough to find out why the Federal government continues to trespass on his farm. A simple assault charge became a complex property records investigation, with Thompson and Yarborough searching through more than 150 years of deeds and survey maps to find an answer that dates back before the creation of the United States, when Maryland was still a colony.

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