For a long time, the court of law and the law enforcement agencies around the world devised different methods of innovative and advanced ways to bring criminals to justice. One of their tactics, however, forever changed the course of history in the investigation because of the discovery of lie detector test which has become one of the most used methods of investigation around the world.
It has proven itself to be remarkable when it comes helping if not thousands but millions of people around the world to solve criminal cases making it a very valuable tool for law enforcers seeking to bring justice to those are in need.
You might be thinking right now, what makes lie detector test advantageous and beneficial to law enforcers and how do they use it? Lucky for you because in this article, we will discuss its uses, benefits and the way it works which for sure will be an informative guide for you.
Lie detector test is also known as a polygraph test. A polygraph machine is used during interrogation between the law enforcer and the person of interest who is required to undergo questioning for the case he or she is involved in. They could either be a witness or the accused themselves. The liedetectortest.uk has straps that is wrapped around the body’s pulse areas such as the chest, arms and wrists to detect any unnecessary increase of heart rate, increase in blood pressure, sudden perspiration and other manifestations that police can tell that the person is lying to them and how the person reacts to the impact of the question thrown at them during the questioning and tell if they are telling the truth or just being deceptive.
How Accurate Are Lie Detectors?
Until now there’s no concrete evidence that lie detector tests are one hundred per cent accurate it’s because some people who undergo questioning tends to be nervous and jittery at times especially if they are asked sensitive questions and accusations. It’s human nature to feel fear if you’re being questioned or accused of something you didn’t do. There are a lot of actors, however, that makes lie detectors effective for solving crimes and investigations and that relies on the expertise of the technician that handles the polygraph machine.
Even to this day, law enforcers still use lie detector tests as part of gathering evidence in their investigation even though it drew some backlash from its critics particularly human rights activists who protest the inaccuracy of this kind of method of investigation that often points out the wrongly accused people. However, a lie detector test’s result won’t be used as the principal evidence but rather it is only considered part of the evidence.
Law enforcers also use polygraph machines as an intimidating factor to suspects who are hard to interrogate and gain information from. Aside from depending on the sudden physiological changes and movements of the suspect, law enforcers also used some scare tactics to spill out the truth from the suspect or encourage them to testify and confess all the needed information to solve the crime. However, people who undergo lie detector test questionings repeatedly won’t help solve the case but rather narrows the information the law enforcers can extract from them.