"University Post: The Unofficial Newspaper of Brigham Young University" reports an interview with the director of the Standards Department. He acknowledges that students suspected of cheating, illegal drug use, stealing, or homosexuality are expelled from BYU if they refuse to take a polygraph examination. BYU Security has a licensed polygraph examiner. In a separate article, the newspaper's photographer reports observing Church Security using specially trained dogs to search for bombs prior to public meetings attended by general authorities in the Salt Lake Tabernacle.
[Source: The Mormon Hierarchy - Extensions of Power by D. Michael Quinn, [New Mormon History database ( http://bit.ly/NMHdatabase )]]