Advancement in Forensic Technology

of the lie detector in criminal investigation. John Larson, a “college cop”, student of Vollmer, who built the first lie detector in the Berkeley department, later said that he felt the technique had

The lie detector was fabricated in the 1920s. It was a machine that could detect if someone was lying or not. This device could be resourceful back in the 1920s, because people used to lie and cheat to proves that they were wealthy. For example, F. Scott Fitzgerald uses characters in the novel The Great Gatsby that prove lying and cheating was quite common in the 1920s. Characters like Daisy, Tom, and Gatsby, help elaborate the setting/theme of the novel and therefore help readers to better understand the lifestyle of the 1920s. In the novel The Great Gatsby, by F. Scott Fitzgerald he used characters to further analyze the values and goals in the 1920s.

You are sweating and your heart is racing. All that and the heavy breathing leads the examiner to believe the you are lying, but you are telling the truth. Many people fail lie detector tests because they are anxious or nervous, but they are telling the truth. By the same token, many people can lie and pass a test because of the tricks and tactics they can use to pass. Although many police stations use lie detector tests during interviews, they are not completely accurate and could lead to false judgements.

My question for my project was does lying show/create a physical reaction in the body? With the information, I have gathered I have determined that the physical reactions the body can produce when lying consists of the difference in breathing, covering the face, avoiding eye contact, an action that distracts them from the conversation such as hair twirling and nail biting. I have also determined that the three factors taken into account for a polygraph/lie detector are perspiration/sweat, heart rate, and blood pressure.

Ms. Shier, I strongly agree with you. The polygraph test should not be utilized in the criminal justice system due to its accountability. It is designed to detect the nervous arousal in an individual by analyzing their stress. We are living in a day

Forensic science is a broad term that refers to the use of science or technology in a court room environment. Forensic science plays an important role in modern popular culture; the police procedural is highly dependent upon cutting-edge forensic science. Moreover, many people are aware of the impact of DNA testing on the modern criminal justice landscape. However, forensic science actually predates many modern scientific advances; almost as long as there have been controversies, there has been some type of forensic science.

The way the polygraph was designed to see if the defendant was telling to truth. The examiner would hook the respondent up to the machine, which would measure their respiration, pulse, and blood pressure as a series of questions asked and measured how the response was given. The technique they used would be to initially ask questions that were true, then ask questions that were false to get a baseline and see the difference between how their body responded to the types of questions. So when the test taker was to be asked a question, they could tell if the person was lying by the increase changes of respiration, pulse, or blood pressure. In time, the polygraph became a controversial issue because some would argue that if people can control their state of mind, they can falsify or pass the test. “An underlying problem is theoretical: There is no evidence that any pattern of physiological reactions is unique to deception. An honest person may be nervous when answering truthfully and a dishonest person may be non-anxious” ("Truth About Lie Detectors (aka Polygraph Tests)," 2004). Most state courts agree that a polygraph does not show a great enough validity for the information to be used in court as evidence. However, this is a tool in the initial stages of evidence collection that police use to get a

A polygraph commonly known as a lie detector is designed to detect deception and false statements. Polygraph measures and records bodily functions such as blood pressure, pulse, respiration, and skin conductivity during questioning of a subject. The theory behind the polygraph machine and examination is that deceptive answers from the subject will produce physiological responses that are different than truthful answers. The polygraph has been surrounded by controversy for years due to its limitations and inaccuracy, and is not considered reliable as evidence in most court cases.

Forensic science can be defined as the scientific methods and processes in crime solving (International Student, 2017). The many advancements in this field over past years have led to it including many specialist areas such as DNA and ballistics. Forensic science is derived from several scientific branches including biology, chemistry and physics, with its main focus being the recognition, identification, and evaluation of physical evidence (Crime Science Investigator, 2017). It has also become a valuable and essential part of the legal system as it uses a range of scientific methods to gather accurate and important information, relevant to criminal and legal evidence.

This is because a traditional polygraph deals with our nervous system reactions and not other parts of our brain that we use to think. These new test are trying to focus solely on the brain and how it functions not how our body reacts to certain things. So, these new tests have focused on what is called an fMRI, or a functioning MRI, which works by actually having a live feed of your brain instead of just pictures like a normal MRI. In a polygraph test the normal use is what is called CQT, or a control question test, which I talked about earlier that asks control questions, relevant questions, and then irrelevant questions which all lead to different reactions, this is a traditional test and is the only one allowed to be called a “lie detector test” (Wolpe 40). But there is another test that scientists believe affects your brain more and that is called a GKT, or guilty knowledge test, which asks questions where only someone who saw or committed the crime would know the answer to. This type of test affects the questioned person before they even answer which is showing signs of relating to brain activity away from the nervous system (Wolpe). This type of questioning is now being used in conjunction with fMRI’s instead of polygraphs to do a thing called “brain fingerprinting”. Brain fingerprinting is a method that uses brain activity to measure if someone is lying or not based on how the brain reacts to certain situations. The only problem with these tests is that they are very hard to replicate with the same person using the same circumstances knowing they are true. This problem is trying to be solved with new methods of fMRI usage, like measuring something called BOLD fMRI which measures the blood flow in your brain to determine whether you are lying or not (Wolpe 43). These all have had good effects according to the scientists that use them although they

Credibility- Now, I would like to consider myself an expert lie detector, but apparently binge-watching 12 seasons of Criminal Minds in 3 months does not give me those qualifications. So to better inform and assist you, my lovely audience, I did some research, mostly utilizing online materials.

Polygraph tests are simply not reliable enough to determine a person 's punishment that can be life changing. There are quite a few things that make a polygraph test tick and not all of them are as reliable as they may seem. There are a few different factors that come into play when someone is taking a lie detector test. “William M. Marston invented the first lie detector in 1917,” (Hammiett, 2016 p.1). His attentions were great, and he thought that it would be accurate and efficient with no problems. “However, in 1923, the D.C. Court of Appeals stated that there was not enough scientific evidence to support Matson’s lie detector machine,” (Hammiett, 2016 p.1). If there wasn’t enough evidence, then what makes us think that there is now? It is the same as it has always been and if the D.C. Court of Appeals says that there isn’t enough scientific evidence to support it, then we shouldn 't use something that is

With people telling lies, officials must use a technology in order to test the truth. This machine is used in criminal cases and even used by random citizens. The polygraph is a big controversy in the world of law, as people argue the insignificance of the machine and how it does not work as others argue the way it has solved cases and worked. The polygraph test is used in famous cases such as the OJ Simpson case. OJ Simpson took the polygraph test to show only his lawyers that he was not guilty but ended up failing the test (Here). The main reason I, or any other person can relate to this topic is that everyone lies. But, I can also relate because due to having a big brother, I am blamed for something I did not do, and am forced to

William M. Marston invented the first lie detector around 1917. He claimed to be able to detect verbal deception by using a machine to measure an increase in systolic blood

Everyone wants to know if this is actually something that can happen or can be proven. Can it be done unconsciously? Can a polygraph be beat consciously? Although this test is conducted by trained professionals about compete clear subjects that turnout 99% accurate, can be beaten. The word polygraph comes from a Greek word polygraphs which means to “sniff out bullshit”. Polygraphs have been around since the 1920’s a process known as psychophysiological detection of deception. Devices that monitor a subjects physiological responses from stressed designed questions. Polygraph theory dictates will show a spike in bodily functions such as blood pressure, respiration, galvanic skin condition, and perspiration. This article tells you over 5 ways