A polygraph test on Staten Island! Tell us why you need a private lie detector test on Staten Island? The most common reason is for suspected cheating in a relationship. Theft and abuse are the next most requested. Not filmed or shared. Private testing is completely confidential. Usually no names are needed. Privacy. The polygraph group founder is nationwide polygrapher John, known as TV's 'Lie Detector Guy' thanks to his nearly 40 years of polygraph experience. When not testing for private pers