Unfortunately, detectives very rarely use the services of a polygraph examiner. Checks when hiring people, they really won’t bring any money. But who said that this is the only field of activity of a polygraph examiner? And in general, it is considered (not publicly) that this is his lowest level of qualification. In order to make money on a polygraph, you need to be interested in various areas of its development and application. You say "no orders have arrived" - nonsense! In order for orders to be received, it is necessary to give advertisements and advertisements that will touch “for the customer’s lively”. For example, the work of hired personnel is relevant for the "rich Pinocchio", how their work is performed in relation to children (where there is no way to see the recording on a hidden camera). Other activities are internal investigations in companies. Information "leaves", causing damage to the prestige of the image of the company, and whoever does this, no camera will say or show. Your admiration for the lie detector by voice is again from illiteracy. It's not that he is Israeli, but that he makes a lot of mistakes (up to 40%), Russian-language markers that distinguish lies from truth do not coincide with English-language markers (this is the problem) and is used by polygraph examiners as a toy for children. And how do you keep in touch with law enforcement officers, if you really supported them, then they would share information with you and instruct you to do some work. where, again, you can use the polygraph (participation in investigative actions and experiments).