The Role of Eyewitness Testimony and the Weapon Effect in a Criminal Investigation

Eyewitness evidence has always been considering critical information when it comes to court trials and convictions. But how reliable are eyewitnesses? Scientific research has shown that eyewitness’s memories are often not accurate or reliable. Human memory is very malleable and is easily changed by suggestion. Relying on eyewitness evidence instead of scientific data often leads to wrongful convictions. Scientific evidence is much more reliable, and should be more important in court cases than eyewitness evidence.

According to “The Science Behind Eyewitness Identification Reform” there are two main variables that affect eyewitness testimonies “Estimator variables: are those that cannot be controlled by the criminal justice system. They include simple factors like the lighting when the crime took place or the distance from which the witness saw the perpetrator, and the degree of stress or trauma a witness experienced while seeing the perpetrator” and “System variables: are those that the criminal justice system can and should control. They include all of the ways that law enforcement agencies retrieve and record witness memory, such as lineups, photo arrays, and other identification procedures”. Eyewitness misidentification has led to 75% of false convictions that were overruled by modern DNA testing according to “The Innocence

Despite the efforts of the courts and law enforcement agencies to improve the handling of eyewitness testimony, misidentifications continue to be a major contributing factor to false convictions. The Innocence Project is a national litigation and public policy organization that has been dedicated to exonerating wrongfully convicted people through DNA testing. Since their inception in 1992, they have helped overturn 311 wrongful convictions in the United States, as of the date of this paper. Of those 311 cases, they have determined that misidentification has contributed to approximately 73% of those wrongful convictions ("The Innocence Project"). That is an extremely high percentage, and something needs to be done about this.

In order to comprehend the contribution of psychology to areas of criminal investigation it is important to evaluate research into two of the following areas of criminal investigation: eye witness testimony and offender profiling as well as assess the implications of the findings in the area of criminal investigation. In addition, this essay, with reference to relevant psychological research, discuss how the characteristics of the defendant may influence jury behaviour as well as analyse two psychological influences on the decision making process of juries. In order to improve the efficiency of detection and successful prosecution of crime it is important to underline that in a previous administration, detection of serious crime was poor and eyewitness testimony appeared very unreliable, partly due to standard interview techniques yielding confusing results. It is therefore this essays primary focus is to provide the chief constable with a report explaining how psychologists might be able to improve this situation with a full evaluation of process and evidence.

Psychological research shows that eyewitness testimony is not always accurate, therefore it should not be used in the criminal justice system. Discuss.

There are a number of factors can reduce the accuracy of eyewitness identifications for example; extreme witness stress at the crime scene or during the identification process, presence of weapons at the crime; because they can

There has been considerable interest and study in the accuracy or inaccuracy of the use of eyewitness testimonies in the current criminal justice system. Results collated by several studies add to the bulk of literature suggesting that the current usage of eyewitness testimony by the legal system is far from ideal. Currently, high emphasis is being placed on reviewing and reconsidering eyewitness accounts (Leinfelt, 2004). In particular, recent DNA exoneration cases have substantiated the warnings of eyewitness identification researchers by showing that mistaken eyewitness identification was the largest single factor contributing to the conviction of innocent people (Wells & Olson, 2003). In this essay, the use of eyewitness testimony in the criminal justice system will be explored, with a particular focus on the impreciseness of this practice.

In the past decade, eyewitness testimonies have cast a shadow on what is wrong with the justice system in today’s society. Before we had the advanced technology, we have today, eyewitness testimonies were solid cold-hard facts when it came to proving the defendant was guilty. However, time has changed and eyewitness testimonies have proven to be the leading causes of wrongful convictions due to misidentification. The Thompson and Cotton case is a perfect example of how eyewitness testimonies can put an innocent man behind bars.

In Canada, the leading cause of wrongful conviction is due to the factor of eyewitness account. It has been proven that individual’s minds are not like tape recorders because everyone cannot precisely and accurately remember the description of what another person or object looks like. The courts looks at eyewitness accounts as a great factor to nab perpetrators because they believe that the witness should know what they are taking about and seen what occurred on the crime scene. On the other hand, eyewitness accounts lead to a 70 percent chance of wrongful conviction, where witnesses would substantially change their description of a perpetrator.

It has been shown that eyewitness misidentification is one of the biggest factors in wrongful convictions, which has been overturned due to DNA (Innocence). Forensic evidence is one of the factors used to determine ones’ guilt or innocence in the court of law; however, some of the evidence used can pose a problem in court. Eye witness testimony has caused a lot of faults in court cases because it is portrayed as a strong factor of evidence. Eye witness testimony should not be used as primary evidence because of how unreliable, misidentified, and the impact it can have in the court of law. Eyewitness identification should have different alternatives in how it should be presented to the witness so that bias is not present.

Eyewitnesses are critical to the criminal justice system, but there have been issues involving eyewitness testimonies, which occasionally cause them to be seen as unreliable. According to innocenceproject.org, 72% of DNA exoneration cases in the United States have resulted from eyewitness misidentification. This is concerning because in a study by Benton, Ross, Bradshaw, Thomas, and Bradshaw (2005), they examined jurors, judges and law enforcement’s knowledge about eyewitness issues. They found that those involved in the legal system are still very unaware of eyewitness memory research, and the reasons behind why eyewitnesses may or may not be considered reliable. There needs to be a way to increase reliability so that eyewitnesses are able to accurately recognize perpetrators and other important information to put the guilty people away, and to keep the innocent people free.

According to Scheck, Neufeld, and Dwyer (2003), the majority of convictions overturned by DNA evidence involved mistaken eyewitness testimony. The Innocence Project estimates that around 70% of the convictions due to eyewitness misidentification have been overturned by DNA evidence (2015). A main factor in this occurrence is that eyewitness memory is unreliable (Wright, 2007). Eyewitness identification in a line-up is an important tool in criminal investigations. The eyewitness evidence that results from these line-ups has an impact on the subsequent investigation and prosecution procedures (Wells, 1984). Furthermore, according to Wright, it is not just about witnesses making errors when identifying, misidentifying, or not identifying, a suspect

The impact of eyewitness testimony upon the members of a jury has been the subject of various research projects and has guided the policies formed by the federal government regarding its competent use in criminal matters (Wells, Malpass, Lindsay, Fisher, Turtle, & Fulero, 2000). Therefore, eyewitness studies are important to understand how

There are many different factors that play a part in the increased chance of a witness correctly identifying a suspect. Such factors should be brought to the attention of the jury and the judge to help in properly assessing whether a witness is correctly identifying a suspect. A study by Magnussen, Melinder, Stridbeck, & Raja (2010) found that of the three different types of people: judge, jury, and general public, that for the most part all where fairly ill-informed on the reliability of eyewitness testimony with judges having the most. Judges only had about an 8% difference in knowledge when compared to jurors. With this information it is very clear that education on the reliability of eyewitness testimony needs to become more of a general knowledge information for the everyone, especially people who are involved in upholding the law. Another factor to look into when evaluating the accuracy eyewitness testimony is the role that memory plays. Memory is divided into three processes: perceiving, remembering, and recalling information (Simmonsen, 2013). There is plenty of room in all three of those stages to forget or falsely remember something. Some factors that play a part when a person perceives an event is the amount of time they are exposed to the event and the suspect. A study conducted by Horry, Halford, Brewer, Milne, & Bull. (2014) found that witnesses were increasingly more likely to correctly identify a suspect if they had been exposed to the suspect for sixty

Eyewitness identification and testimony play a huge role in the criminal justice system today, but skepticism of eyewitnesses has been growing. Forensic evidence has been used to undermine the reliability of eyewitness testimony, and the leading cause of false convictions in the United States is due to misidentifications by eyewitnesses. The role of eyewitness testimony in producing false confessions and the factors that contribute to the unreliability of these eyewitness testimonies are sending innocent people to prison, and changes are being made in order to reform these faulty identification procedures.