HNGN True Crime Contributor Jon Leiberman, as part of HNGN's recently launched Law Enforcement Interview series, recently chatted with Jack Trimarco, an internationally known expert polygraph examiner, also known as a forensic psycho-physiologist.

For almost 21 years, Trimarco served as a Special Agent for the F.B.I., including as program manager for the F.B.I. Polygraph Unit at the Los Angeles Field Office from 1990 until his retirement in 1998. He also served as Inspector General for the U.S. Department of Energy Polygraph Program between 2000 and 2002. Following his training with the Department of Defense and the F.B.I. as a polygraph/ lie detection expert, he has conducted more than 3,500 polygraph tests throughout the world and is a California State Private Investigator.

For the complete list of future interview subjects in the Law Enforcement Interview series, click here, and to submit questions, simply send us your query by using our Newsbreaker form on the upper right-hand corner of the HNGN home page, and Leiberman will pick several for our guest experts to answer.