Friction Ridge Comparison Theory

Improved Essays
Friction Ridge Comparison Summary

Introduction:
Friction Ridge comparison is used a lot by the CSI and FBI nowadays. The purpose of the study was to come up with a basic analysis of the science of friction ridge patterns on skin, and to approve further research for the friction ridge patterns on the skin to be tested, and to come up with a hypothesis for that idea/theory. At first the scientists was unable to find the right piece of information (literature) that supports their assumptions of the friction ridge patterns of skin, until they found a way. They decided to interview professionals in fingerprint analysis, look at statistics, other legal information and other scientists to help understand the basis of it and to collect any information
…show more content…
This approach is used to understand the results and inputs separately with no connection deduced between them. For analyzing friction ridges using the black-box approach, the examiner must be tested with many inputs that have range of categories of prints. The black-box approach would help determine whether it is possible or not to have accuracy. There is also some subjectivity in using the black-box approach. In the approach, one would have to use a blind technical review and that the examiner would also have no awareness of the findings from the previous person that was examining the data (fingerprint ridge …show more content…
This approach is to have a certain number of people that can test the hypothesis and that have no background information about the research or the experiment itself. For this study, once a minimum threshold is set, then it should be selected by the best latent examiners. The minimum threshold must have the clarity and quantity of features (of the latent fingerprints) and also include all the levels of details, basically no minutiae. The group of scientists found out that there is no official minimum threshold, so examiners would just simply send a latent print to illustrate simply not continue with the process unless there are a certain 7 points on the print. The seven prints can be used as placeholder for the minimum threshold. The seven points are tested by models based on statistics and black-box testing. The qualitative approach can include the black-box approach based on certain situations (identifying 7 points on a latent print). The quantitative approach seems much more in depth than the black-box

Related Documents

  • Improved Essays

    Possible latent fingerprints were collected from the exit point and placed into evidence. Video coverage of the front door of the…

    • 1124 Words
    • 5 Pages
    Improved Essays
  • Great Essays

    Trail Warna Case Summary

    • 641 Words
    • 3 Pages

    The general role of the Bloodstain Pattern Analyst in a criminal investigation is to assist in the reconstruction of those events of an alleged incident that could have created the stains and stain patterns present at a crime scene, on items of physical evidence recovered from that scene and on items of clothing that were present at the crime scene. In some cases, it may be necessary to conduct a bloodstain pattern interpretation using photographs. The usefulness of individual bloodstains and bloodstain patterns lies in their retention of information descriptive of the possible events that could have produced them. The sizes of the individual stains composing a pattern, the shapes of these stains and their distribution relative to one another can be utilized for the purposes of determining how a particular stain or pattern may have been produced. Bloodstain pattern analysis evaluations are conducted to determine what action(s) or sequence of actions could have created the bloodstains and/or patterns observed.…

    • 641 Words
    • 3 Pages
    Great Essays
  • Superior Essays

    Havvard Case Study

    • 696 Words
    • 3 Pages

    They were tested in a lab and the examiners concluded that they did match the ones taken from Havvard. It was this evidence used in the trial that was called into question during the appeals process later on. Havvard first argued that fingerprints weren’t found to be reliable yet and it was due to that reason that they shouldn’t be allowed in his case. In order to fight those claims, they courts relied upon the testimony they had already heard by Stephen Meager. Stephen Meager worked for the FBI and was a fingerprint expert at the time of this case.…

    • 696 Words
    • 3 Pages
    Superior Essays
  • Improved Essays

    D. Fingerprinting is an impression or mark made on the surface by a person's finger tip. It is used for identifying individuals from the unique pattern of whorals and lines. This fingerprinting is valuable to detectives case because the detective who has the mystery case, where a person was murdered would use fingerprinting. You would use fingerprinting to track down the murder and the bystander.…

    • 1079 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    Blood spatter analysis is the examination of shapes, locations, and distribution of blood spatter in order to interpret and develop a storyline leading to what exactly caused the blood shed. Blood spatter analysis is often used as a criminal investigative tool used by criminal investigators, such as the police and the government. Blood spatter was discovered and used in the late 1890s, however it was not known as a highly valuable forensic tool until the late 20th century. The topic of blood spatter analysis is important for a variety of reasons, but the most pertinent one is that it helps close criminal cases. This topic is important because it helps determine how easily investigators will be able to close case in which there is bloodshed.…

    • 930 Words
    • 4 Pages
    Improved Essays
  • Decent Essays

    John and Patsy Ramsey were no longer people of interest in the murder of their daughter on July 9th thanks to touch DNA analysis. Touch DNA analysis is defined as: analysis of skin cells left on firearms, victim’s bodies, or any other surface at the scene (Minor, M.S., 2013, p. xx). Touch DNA analysis was brought to the forefront by the Ramsey case in 1999. Crime Scene techs collect skin cells from the crime scene and test them using PCR (polymerase chain reaction) to make copies of 13 locations on the DNA (Minor, M.S., 2013, p. xx). It only requires 7-8 cells from the epithelium (Houck & Houck, 2008).…

    • 250 Words
    • 1 Pages
    Decent Essays
  • Improved Essays

    Gary Dotson Case Study

    • 460 Words
    • 2 Pages

    Despite all of the good that using science in criminal investigation has done. Like all things there have been some hiccups. DNA testing has both enhanced and eroded the status of forensic science in criminal cases. Conventional forensic disciplines were unable to identify a perpetrator with any true discrimination. For instance, conventional serology (the study antigen or antibodies) field analysis of blood group substances was largely used in sexual assault cases during the 1980s (Mosby's Medical Dictionary 8th edition, 2009).…

    • 460 Words
    • 2 Pages
    Improved Essays
  • Decent Essays

    Dna Crime Lab

    • 117 Words
    • 1 Pages

    In the science text DNA analysis by Forensic Richard Platt. Look at the crime lab and DNA. Analysis look a DNA to fined fingerprint to know who DNA it is. Crime lab’s use DNA to look at crime’s to help and solve. Crime’s lab’s look at DNA that is left behind at the crime.…

    • 117 Words
    • 1 Pages
    Decent Essays
  • Superior Essays

    Csi Effect Myth

    • 2213 Words
    • 9 Pages

    The jury system in America can be viewed as a cornerstone of American democracy. It is the only place within the Criminal Justice System where the average American can participate without any legal experience or expertise. As Americans, there is a reliance on jurors to make fair, unbiased and relatively quick decisions (Cole and Dioso-Villa 2007). Since the early 2000s, the media has propagated the myth that television shows like CSI, which use forensic science, have created a “CSI Effect.” If this CSI Effect were true, it would dismantle the jury system and create real questions concerning the reliability of the decision making process.…

    • 2213 Words
    • 9 Pages
    Superior Essays
  • Decent Essays

    Finger Knuckle recognition system and finger back surface is one of the recent biometric methods used to identify people. The finger knuckle print is highly rich in textures and can be used to uniquely identify a person. In this paper we propose figure knuckle based biometric person identification using subspace methods such as Gabor filter, PCA and LDA. These methods need two images: test image and train image.…

    • 147 Words
    • 1 Pages
    Decent Essays
  • Improved Essays

    I picked the July 2016 edition of National Geographic because the front cover caught my immediate attention. It has a picture of a fingerprint and it references the CSI. I love anything related to the CSI and FBI so I thought this issue will be a great choice for me. The first article I read was titled “Beyond Reasonable Doubt.”…

    • 887 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Wrongful sentences happen when innocent individuals are found at fault in criminal trials, or when defendants feel obligated to plea-bargain to crimes. Many of these defendants will only plead guilty hoping that they can escape the death penalty. The term unlawful conviction can also denote to cases in which a jury erroneously finds an individual with a good defense guilty, examples would include self defense, or where an appellate court reverses a conviction (unrelatedly to the defendant’s factual guilt) obtained in violation of the defendant’s legitimate rights. With the rising number of exonerations and growing awareness that such injustices occur every day in American courts, raises reflective doubts about the accuracy and fairness of the…

    • 1537 Words
    • 7 Pages
    Improved Essays
  • Decent Essays

    The fingerprints were on the table she probably was trying to grab on the table when alex feel Alex Garcia’s finger print is a plain arch. The reason why I think alex feel and tried to get back up because the fingerprints were on the table and alex was lying on the floor. The blood type and the blood spatter plays a huge part in a crime scene, it can determine who who is a suspect or a victim it is one of the biggest pieces in a crime scene investigation, in our investigation the blood matched up with anna garcia, which is who the girl who was killed, it can tell us from what height she bled from, what angle, and more. The shoeprints can help in an investigation a little bit by, if you can clearly see the serial number you can track down what kind of boots they are and find out who bought them and you can track that suspect down, we identified the shoeprint as Ericas shoeprint. Hair can be a huge factor…

    • 586 Words
    • 3 Pages
    Decent Essays
  • Superior Essays

    In creating these programs, the NIJ uses a comprehensive process to make valid technology programs for the criminal justice system. This process uses the research, development, testing, and evaluation approach to “ensure that the NIJ’s research portfolios are aligned to the best technology needs of the criminal justice community,” (Justice, 2009). For example, the NIJ formed a working group to study some of the disadvantages of the praised specialized database, the AFIS. The Automated Fingerprint Identification System (AFIS) is a specialized database that is designed to match known and unknown fingerprints with intentions on connecting a suspect to a pending crime or to an unsolved crime. The Integrated AFIS has a hierarchical structure that is perpetuated throughout the United States.…

    • 992 Words
    • 4 Pages
    Superior Essays
  • Great Essays

    Topic: Psychological Profiling General Purpose: To inform Specific Purpose: To inform my audience about psychological profiling. Central Idea Statement/Thesis: I will discuss (1) what psychological profiling is, (2) the profiling of Jack the Ripper, and (3) the most important uses of psychological profiling. Introduction I. [Attention Getter] Which well-known murderer is not defined as a serial killer? (Pictures of known offenders) II.…

    • 1236 Words
    • 5 Pages
    Great Essays

Related Topics