Truth clarification and verification are the main reasons for taking a polygraph test. A private investigator who is also a certified polygraph examiner can provide his or her services to customers who need to verify truth or deception in business or private family matters. Lie detector polygraph tests can help verify or clarify the truth, help a person wrongly accused of something in a personal vendetta or any other situation, confirm or deny the suspicions of a person whose spouse might be cheating, solve a business dispute, and other private matters that may arise.


Private Investigator Skills

Private investigator skills come in handy when dealing with sensitive issues related to reassuring family or colleagues because private investigators are trained to be empathetic, and sensitivity is very important in polygraph cases. In cases of resolving private family matters, taking a polygraph test can sometimes be the only way to get an unbiased solution and the answers sought.

Personal vendetta cases are also of a sensitive nature. Taking a polygraph test can sometimes be the only way to get to the truth in such cases. Whether the case arises from a personal relationship, a business relationship or a police investigation, a polygraph test can serve as evidence that any vendetta against the accused is built on lies and reveal any dishonesty in a short period of time. In such cases, hiring a private investigator to get the job done is the best approach.


Polygraph Service Firms

Polygraph service firms can also be employed to clear a wrongfully accused person’s name. If there is very little evidence to prove that the accusation of, for example, stealing at the workplace or committing a more serious crime is false, a polygraph test can be a solution to prove that the person is innocent. The test can help restore the accused person’s reputation and enable them to carry on with their life. This technique is also sometimes employed by various commercial organizations to see whether the interviewed candidate is a good fit for the occupation and the position they are applying for.

If the person taking a polygraph test is guilty of whatever he or she has been accused of, the lie detector will detect the accused body responses and determine that they are guilty. This is done by evaluating the physiological reactions of the subject’s body to the questions asked. Polygraph examiners are often employed by the police or the government to find that out.

It is important to bear in mind, however, that the answers received from polygraphs lie detectors might not be correct. As illustrated by a recent polygraph Doug Williams case in the US, polygraph accuracy isn’t always fool proof. For instance, a person wrongfully accused of a crime he or she did not commit may nevertheless make a lie detector believe that they are lying, because they are too nervous or anxious.