Susan Constantine is a leading expert in body language and human behavior with over 18 years of experience consulting on some of the most high-profile true-crime cases, including Karen Reed, Luigi Mangione, Elizabeth Holmes, Brian Kohlberger, Lori and Chad Daybell, the Menedez brothers, Amanda Knox, Jeffrey Epstein, Michael Jackson, George Zimmerman, Casey Anthony, Alex Murdaugh, BTK-Denis Rader, and hundreds of others.  

With a deep understanding of body language and expertise in detecting deception, Constantine excels at identifying dangerous personalities such as narcissists, sociopaths, and psychopaths. Her insights into criminal behavior have made her a sought-after expert for those looking to understand the psychology behind criminal minds. An accomplished author of The Complete Idiot’s Guide to Reading Body Language and How to Spot a Liar in 7 Seconds or Less, Constantine has trained government agencies, law enforcement, and legal professionals nationwide. She has also appeared in over 2,500 media outlets, including CNN, Dr. Phil, Nancy Grace, and Good Morning America, offering expert analysis on criminal cases and human behavior.