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Important of forensic science
Role of forensic science
Essay on blood pattern analysis
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Many of us enjoy watching crime scene investigation shows, but in the criminal justice system forensic investigation is an essential field that requires upright observations and a prodigious interpretation. Under forensics, it is difficult to blame someone without scientific data. For that reason, Larry K. Gaines author of the textbook Criminal Justice in Action explains the importance of Blood Spatter Analysis. Specialist can learn a great deal about violent crime by examining where blood landed at the scene, the size and consistency of drops, and the pattern of blood spatter (Gaines, 2011). Consequently, an article of the Blood Spatter Analysis will be used to explain the research methodology the author uses to proceed certain investigations. Originally, the source used to discuss the research methodologies and the application to evaluate blood spatter evidence is the Bloodstain Pattern Analysis with an Introduction to Crime Scene Reconstruction by Tom Bevel. In a short explanation, the expert describe the involvement of criminal and forensic investigations. In addition, The Blood Pattern Analysis explains a proven methodology that engages the scientific method and provides focus and structure to the analyst as they conduct the analysis (Bevel, 2008). The scientific method is a form of quantitative data according to Peter B. Kraska, author of the textbook Criminal Justice and Criminology Research Methods. Quantitative data includes experiments, surveys/interviews, and nonreactive methods; each reviewed in detail, along with real-life examples of research to both theory and criminal justice practice (Kraska, 2008). A step further with the scientific method, the bloodstain pattern analysis helps establish a key to find the event... ... middle of paper ... ...as led to explain the scientific-method methodology and provides the adequate structure of how the blood spatter analysis work. The quantitative research have shown that using the scientific-method methodology can help us get a step closer to identify homicide such as the one explained in the video-tutorial. Finally, the expert by Bevel gave an exclusive explanation on how the scientific method provides the analyst a good source of help when identifying the blood spatter analysis with different variables and valid information. Works Cited Bevel, T. (2008). Bloodstain Pattern Analysis With an Introduction to Crime Scene Reconstruction. New York : Taylor & Francis Group, LCC. Gaines, L. K. (2011). Criminal Justice in Action. Belmont, California: Cengage Learning. Kraska, P. B. (2008). Criminal Justice and Criminology Research Methods. Boston: Pearson Education .
T. Paulette Sutton is one of the world’s leading experts in bloodstains and is the former Assistant Director of Forensic Services and Director of Investigations at the University of Tennessee, Memphis. She has been involved in nationally known murder cases and has worked hard during her long career to make a position contribution to the legal system. Sutton says, “Its best for my fellow man that we get the killers off the street.” Since 2006 Sutton has been officially retired but continues to teach, consult, and testify about her area of expertise.
...me scene, by recreating the scene using the blood direction a bloodstain patterns. Bloodstain pattern analysis use biology, chemistry, math, and physics to solve a crime. In doing research on this topic there is a lot of detail to go into this topic, so in suggestion this paper need to explain the other different investigators that process any crime scene.
What is Bloodstain Pattern Analysis (BPA)? My loose explanation of it is, (BPA) is the scientific study of the direction and shape of a bloodstain after an accident or incident has taken place. Once carefully examined a conclusion can then take place to determine many things like, where the person(s) was standing on impact, what force caused the impact, how hard the person(s) was hit, and was this force the cause of death, if death occurred in the case. Bevel and Gardner (2001), explain (BPA) as “the examination of the physical nature of bloodstains provides information specific to the events that occurred during the incidents.” Bevel and Gardner (2001) also go on to show in more
The blood of the unknown person became apparent through comparing the blood type found at the crime scene with the contrasting blood types of the suspects. The blood identified at the crime scene could have possibly belonged to Anna Garcia or Erica Piedmont. This observation was based on the information that the blood type found at the crime scene was type A and these two individuals are the only ones that carry that specific type. In similarity, a microscopic photography was taken of the unknown hair follicle found at the crime scene. Then hair samples were taken from the potential suspects, and the victim. These findings were then compared. This was done by looking at each individuals hair follicles and comparing it with the unknown one. By looking at the similarities and differences in medulla diameter, the discovery of the unknown hair follicle became established that it belonged to Anna Garcia. Further examination resulted in the analyzation of a shoe print found at the crime scene. Shoe patterns and sizes were taken from each suspect, including the victims. They were then identified and compared to the one found at the crime scene. By looking at the distinct pattern, size, and the fact that both shoes were a Columbia brand sneaker it became obvious that the shoe print was extremely similar to Anna’s shoe design. Through this found evidence it became
Crime scenes are known to have many clues left behind. The obvious would be a the body or bodies, clothing, and sometimes even the murder weapon. While these are great way to solve a case there's another kind of evidence; trace evidence. Trace evidence are small pieces of evidence that are laying around a crime scene. There are many types of trace evidence some of them include metal filings, plastic fragments, gunshot residue, glass fragments, feathers, food stains, building materials, lubricants, fingernail scrapings, pollens and spores, cosmetics, chemicals, paper fibers and sawdust, human and animal hairs, plant and vegetable fibers, blood and other body fluids, asphalt or tar, vegetable fats and oils, dusts and other airborne particles, insulation, textile fibers, soot, soils and mineral grains, and explosive residues. Although these are the most common found elements, they are not the only ones. The Trace Evidence Unit is known to examine the largest variety of evidence types and used the biggest range of analytical methods of any unit. materials are compared with standards or knowns samples to determine whether or not they share any common characteristics. In this paper I will discuss the different kinds of trace evidence and how crime scene investigaros use it to solve cases and convict criminal.
In today’s time, modern Crime Scene Investigation has increased rapidly. From throughout the late 1900’s and in the early 2000’s (Taylor 1). For all of the evidence that they find, a solid foundation has formed over the thousands of years of Crime Scene
"It 's a combination of analyzing the physical and behavioral evidence, reconstructing a crime from the beginning to the end and coming up with the most scientific determination possible with the information available." - (The Profiler by Pat Brown)
Just as insight into the mind of the artist may be gained by examining and comparing the progression of his work, so knowledge of the mind of the serial killer can be ascertained by an examination of his canvas: The murder scene. Forensic profiling is the attempt to do just that. An investigator tries to discern information about the killer based on the information at the crime scene, deducing information about the cause from the effect. This is not an exact science, and has been often likened to an art. It is the goal of this work to provide the reader with a basic understanding of the function and application of forensic psychology, as well as an explication of some of its strengths and weaknesses.
In here I will clarify each potential evidences of the crime and explain of the application of the identified forensic procedure to the facts of the case. One of the perpetrators cuts his hand when trying to drag of the witness in the crime scene. Thus, in this case blood stains would be the one of the potential evidence. The precipitin test might be applied to bloodstains in a numerous ways. It conduct...
...he case of forensics. You can go beyond the normal reality of blood spatter (?.. how does or where did blood spatter come into play here). The species of a set of bones can be determined through forensics anthropology. The sex of a skeleton. The age of a person and by studying the bones you can find a person’s age. Forensics Anthropology, (2014)
In Blood In Blood Out is a drama directed by Taylor Hackford, and starring Damian Chapa (Miklo), Benjamin Bratt (Paco), and Jesse Borrego (Cruz), produced by Hollywood Pictures. The film was based off everyday life in East Los Angeles, from the 1970’s through the 1980’s. Damian Chapa stars as Miklo in the film, a Mexican-American who wanted to be accepted, not by his skin but for the Mexican within him. Benjamin Bratt (Paco) was the older cousin of Miklo, who learned his lesson throughout the movie and changed his ways. Jesse Borrego (Cruz) is the step-brother of Paco who was a talent artist, who ended up turning to drugs because of back problems caused by a rival gang incident.
Review, PubMed PMID: 19543886. Saferstein, R. (2011). Criminalistics: An introduction to forensic science (10th Ed.). Upper Saddle River, NJ: Pearson Education, Inc.
Some cases cannot be solved without this evidence. “Physical evidence refers to any item that comes from a nonliving origin, such as fingerprints, tire marks, footprints, fibers, paint, and building materials” (“PE”). There is also another group called biological evidence. Biological evidence branches from a living thing, including bloodstains and DNA. Forensic scientists place their evidence into categories including these. “Forensic science is the use of scientific principles and methods to analyze material connected with a crime” (Funkhouser). When a crime is committed, law enforcement officers tape off the scene as quickly as possible (Funkhouser). They then search the area for evidence (Funkhouser). Forensic scientists rarely actually go to the crime scene (Funkhouser). Once all the evidence is gathered from the site, it is then cautiously transported to the crime lab to be analyzed (Funkhouser). Everything about a crime scene is taken very seriously. It is a very tedious process, which takes patience and
Blood stains are one type of evidence that can be found at a crime scene. Blood that is still in the liquid form should be picked up on a gauze pad. Once the blood is dried thoroughly it should be refrigerated and sent to the Laboratory (Andrus et al., n.d., para. 1). If the blood stain is found dried on clothing, the officer should wrap the piece of clothing in clean paper and place it in a sealed and labeled container. An object with dried blood stains needs to be sent to the Laboratory if it is small enough. If the object is too large to send, then using a clean knife the stain needs to be scraped onto a clean piece of paper, which then can be folded and placed in an envelope (Andrus et al., n.d., para. 2). When collecting autopsy blood samples, the officer should request that the pathologist obtain the sample directly from the heart and place it in a yellow or purple stoppered vacutainer. If the victim is still alive but in serious need of a blood transfusion, then the pre-transfusion blood sample needs to be obtained promptly before the hospital discards it (Andrus et al., n.d., para. 4). It is important for the Laboratory to receive all blood samples within 48 ho...
Gaensslen, R. E., Harris, H A., & Lee, H. (2008). Introduction to Forensic Science and Criminalistics. New York, NY: The McGraw-Hill Companies, Inc. .