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Quizlet ch 10 bloodstain pattern analysis
Quizlet ch 10 bloodstain pattern analysis
Forensic science hosa quizlet
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Forensics is a very important part of solving crimes. There are many branches of this field. Bloodstain splatter analysis is one of the forensic sciences and is used to help figure out murders. Many things effect the blood splatter. One of which would be the surface the blood lands on. In this expirement the question “how does the surface effect the blood splatter?” will be answered. Blood splatter analysis uses biology, chemistry, mathematics and physics all to pin point the location the person was standing when they were shot and where the shooter was as well. Forensic science is any scientific field that is applied to the law of science. ("Bloodstain Pattern Analysis.") There are 5 groups within forensic science that also have more categories within them. Those being physiological sciences, social sciences, forensic criminalistics, digital forensics and other disciplines. Forensics help locate the attacker or anyone involved in the …show more content…
crime. This can help crime scene investigators by finding finger prints, blood, hair, behavioral analysts, etc. There are many different jobs for people in this area of work. Forensic science has been around since the early 1900s . One of the greatest advancements for crime scene investigation is protective gloves. ("Forensic Science and Crime Scene Investigation: Past, Present, and Future.") This helps them save the DNA or any other evidence that may be there. Forensic science is a very important part of investigations and without it solving crimes could be nearly impossible. Blood splatter analysis can be very important to some investigations.
It can help you discover where the shooter and victim where both located; also how the gun was pointed. For example if the gun was shot straight on it would make smaller blood droplets over a widespread area. The size and how much blood varies on the force and surface. There are three angles of impact. Alpha, beta and gamma; alpha is the impact of the bloodstain path moving out from the surface. Beta is the angle of the bloodstain path pivoting about the vertical axis, and gamma is the angle of the bloodstain path measured from the true verticle of the surface. All three angles are related to the dame trigonometric equations; sin〖∝ =(w/l〗)and tin β= tan∝/sinγ . ("Bloodstain Pattern Analysis.") The surface can effect the bloodstain because of the way it hits it. For example, tile and grass could impair the stain since they both can have irregular shapes. Concrete or woods would be best to see because the surfaces are flat and will not be
deranged. The 4 types of surfaces being used in this expirement are grass, concrete, wood flooring and tile flooring. Grass grows horizontally over the ground and their stems are normally round and hallow. Its mostly found in alpine, lowlands and swamps; but can be grown just about anywhere. Grass also generates a huge business. Most residential lots have grass for curb appeal and so do other businesses. Also many sports require grass. Concrete is made from a hard chemically inert particulate substance called aggregate. ("Concrete | Building Material.") It has been around for a very long time and has always been used for construction and pathways for bikes, pedestrians and motor vehicles. Concrete is usually strong but can be affected by the environment which can also impair the smoothness and texture of it. Wood flooring is easily to maintain and it has soft visual and tactile texture. It also absorbs sound. (“Hardwood | Timber.”) Wood flooring also has slight ridges which can effect the blood stain but not drastically. Lastly, tile is made from thin flat slabs. They vary in size, texture and color. (“Tile”) They are made from plastic, glass and asphalt. Tiles can make blood splatters look strange or change it since tiles have grooves between them and on them. The four surfaces used are all similar yet different at the same time. In conclusion, forensic science has been around for a long time. Blood splatter analysis is an important part of crime scene investigation. In this expirement the surface to have the easiest to process blood splatter will be the concrete since its smooth and has no to little grooves. Grass will be the most difficult since its not together and individual blades.
...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.
Forensic science is a key aspect of Criminal Justice that helps rid the streets of lunatics and murderers. One of the most important fields of forensic science is blood spatter analysis. Under the Crime Scene Investigation, analysts gather the information that could eventually lead to a victim’s killer. Basic and complex information can be found when analyzing blood. We can learn what kind of weapon was used, the time of death of a victim and other important facts that can help a case. The pattern that the blood gives off give forensic scientists the tools that they need to help solve cases.
Bloodstain Pattern Analysis is a forensic discipline which, among others, the position of victims can be determined at crime scenes on which blood has been shed. To determine where the blood source was, investigators use a straight-line approximation for the trajectory, ignoring effects of gravity, drag and overestimating the height of the source. We determined how accurately the location of the origin can be estimated when including gravity and drag into the trajectory reconstruction. We created eight bloodstain patterns at one meter distance from the wall. The origin’s location was determined for each pattern with: the straight-line approximation, the method includes gravity, and the method we use includes both gravity and drag. The latter
The type of blood spatter is a transfer stain. A transfer stain is when a wet bloody surface comes in contact with another surface. Limitations of blood spatter is that it is inconsistent in reconstructing the very same blood spatter pattern. Reconstructing the blood spatter pattern is trying to mimic or imitate the pattern of the blood spatter. Other inconsistencies would be results from different people in the group would not be the same because someone could have made a mistake which means the results could vary from person to
Having the ability to identify types of prints and surfaces, and the corresponding techniques to develop the prints, has helped crime scene investigators identify criminals and victims of scenes, and aided in the prosecution of defendants in the criminal justice system. Although the history and techniques go far beyond what was discussed in these few pages, it is important as a law enforcement officer or investigator to understand the very basics of how fingerprint identification began, and the simple techniques used to develop them today.
The criminal justice system has changed a lot since the good old days of the Wild West when pretty much anything was legal. Criminals were dealt with in any fashion the law enforcement saw fit. The science of catching criminals has evolved since these days. We are better at catching criminals than ever and we owe this advancement to forensic science. The development of forensic science has given us the important techniques of fingerprinting and DNA analysis. We can use these techniques to catch criminals, prove people's innocence, and keep track of inmates after they have been paroled. There are many different ways of solving crimes using forensic evidence. One of these ways is using blood spatter analysis; this is where the distribution and pattern of bloodstains is studied to find the nature of the event that caused the blood spatter. Many things go into the determination of the cause including: the effects of various types of physical forces on blood, the interaction between blood and the surfaces on which it falls, the location of the person shedding the blood, the location and actions of the assailant, and the movement of them both during the incident. Another common type of forensic evidence is trace evidence. This is commonly recovered from any number of items at a crime scene. These items can include carpet fibers, clothing fibers, or hair found in or around the crime scene. Hairs recovered from crime scenes can be used as an important source of DNA. Examination of material recovered from a victim's or suspect's clothing can allow association to be made between the victim and other people, places, or things involved in the investigation. DNA analysis is the most important part of forensic science. DNA evidence can come in many forms at the crime scene. Some of these forms include hair; bodily fluids recovered at the crime scene or on the victim's body, skin under the victim's fingernails, blood, and many others. This DNA can be the basis of someone's guilt or innocence; it has decided many cases in the twentieth century. As the times continue to change and the criminals get smarter we will always need to find new ways to catch them. Forensic science is the most advanced method yet, but is only the beginning. As the field of science grows so will the abilities of the
Forensic Science, recognized as Forensics, is the solicitation of science to law to understand evidences for crime investigation. Forensic scientists are investigators that collect evidences at the crime scene and analyse it uses technology to reveal scientific evidence in a range of fields. Physical evidence are included things that can be seen, whether with the naked eye or through the use of magnification or other analytical tools. Some of this evidence is categorized as impression evidence2.In this report I’ll determine the areas of forensic science that are relevant to particular investigation and setting out in what method the forensic science procedures I have recognized that would be useful for the particular crime scene.
...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)
Forensic scientists work in labs where they examine, identify, and interpret evidence collected in crime scenes. Crime scene investigators collect evidence and pass it to a forensic scientist who uses the items in numerous ways to help catch criminals. Forensic scientists must also record the evidence and any tests run on it in detail to prove the truth in court. A forensic scientist also has to be able to present his or her physical evidence verbally in court, so a strong communication background is important. The first step taken to become a forensic scientist is to first pass the education required to become one.
Bloodstain pattern analysis is a forensic discipline that deals with the physics of the blood, and determines the bloodstains left at crime scenes using visual pattern recognition. It is used to shed light on the reconstruction of a crime scene which includes the cause of death starting with homicide, suicide, accident, and identifying areas with high possibility of the offender leaving his or her DNA samples. There are documented descriptions of bloodstain shapes at crime scenes that date back to past centuries, but it was the Samuel Sheppard case in 1955, that prompted advances in this field. Bloodstain pattern analysis is employed worldwide by scientists, police officials and medics in an interdisciplinary manner. Both the blood itself and the surfaces on which the bloodstains are found are important in the assessment of bloodstains. The umbrella organization for bloodstain pattern analysts is the International Association of Bloodstain Pattern Analysts (IABPA), which offers various forms of membership. The name of the method (bloodstain pattern analysis) is often abbreviated to BPA.
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...
According to the American academy of forensic science, the forensic sciences form a vital part if the entire justice and regulatory system. Forensic science is an enticing career having to do with science and criminal justice, a large variety of schooling is needed to start this job Despite the fact that it can be a dangerous environment it can be an exciting profession to pursue. There are many different fields in forensic science that you can study or major in but they all have the same objectives.
We do have known what forensics is. Forensics that we know is an application of various sciences to answer questions that are important to legal system in which it may be related to a crime. Forensics generallu covering something or methods of a scientific nature and also the rules established from the facts of the event, to do an introduction to physical evidence. This is just a usual forensics. Nowadays, forensics is not just like that, digital devices are everywhere today, helping people to communicate with other people globally, not just between town. We can use that to do some forensics thing too, and find the evidence. It is called Digital Forensics.
“The word ‘forensics’ means “connected with the courtroom”; so forensic science is, therefore, concerned with gathering hard evidence that can be presented in a trial” (Innes 9). Forensic science is a science that is applied specifically to legal matters, whether criminal or civil. “Few areas in the realm of science are as widespread and important as forensic science” (Hunter 12). Forensics is the one science that is most commonly used in everyday life. It is also a branch of science that incorporates other branches of science such as biology, chemistry, and etc. Since it is used almost every day “No one can dispute the importance of the contributions to society made by forensic science; the ability to solve crime is undeniably important” (Hunter 13). Forensic science has given criminal investigation a new edge. “Advances in science have opened the door for more effective evidence discovery, howev...
I will be investigating Human Blood as my specific tissue and giving an overview on the location, characteristics, and the benefits it has to the human body. Blood is extracellular matrix that is consists of plasma, red blood cells, platelets, and white blood cells. Blood is located within the capillaries/veins/arteries of the human body, which are blood vessels that run through the entire body. These blood vessels allow the blood to flow smoothly and quickly from the heart to distinct parts of the human body. The unique parts of human blood all work together for a purpose: the Red Blood Cells(erythrocytes) transports oxygen throughout the body, White Blood Cells(leukocytes) play a part in the bodies immune system, Platelets(thrombocytes) assist in creating scabs,