Blood pattern analyst uses physics to solve the evidence used to solve crimes. Bloodstain samples are collected for BPA by photographs of the stains, rulers swabs and other technology, they also package stained objects. When examining blood spatter, analysts exams the shapes of the blood, location and distribution patterns of bloodstains, to understand the actions and motions of the victim and the suspect throughout the crime scene. For this experiment, I tried to follow their guidelines to examine my own crime scene.
The materials I used for this experiment are a one ounce of red food coloring , four ounces of water and one tablespoon of cocoa powder, I used these materials to make fake blood. I also used a ruler, newspaper, plastic, a
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With these materials I staged my own crime scene. With the help of my two sisters, I made seven different crime scenes, to analyzed blood splatter it was very complicated. I used a hammer to beat a wooden board where I placed fake blood, I also used a boot to get footprints. I used a ruler to measure the bloodstain and as crime scene investigators do I took pictures of the bloodstains on the floor and newspapers I used to cover up my walls. During my research I learned how investigators examines crime and how they know if the crime took place there or not and the amount of force used. When analyzing my crime scene I labeled important evidence, and examined my blood stains and blood splatter. I noticed the different shapes of blood throughout all seven scenes.
Different blood stains have different shapes, depending on the angle in which the blood hits the ground, the shape may consist of simple small circles or some may be long ovals. There are three main categories of bloodstain patterns. Thereś passive blood stains, dynamic stains and transfer contact blood stains. Passive blood stains are stains fall only with the force of
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.
The idea is to get a sort of background story from the random blood distribution. The different types of blood can tell us the method an assailant uses, such as passive blood stains. These stains are made from the drops of a weapon due to gravity. For instance, if an attacker walked away from stabbing someone, the weapon would leave a series of drops.... ... middle of paper ...
Capote opposes the death penalty, almost pleading that Perry is insane. As the Psychologist is unsure of whether or not Perry is insane, the court quickly shuts that escape route down. The imminent death of Perry and Dick makes the reader feel split on the two, where they would rather have Dick put to death and let Perry live, if the reader so chooses that Perry is insane.
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.
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
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
The film There Will Be Blood (2007) is a period picture directed by Paul Thomas Anderson and the director of cinematography was Robert Elswit. Jack Picone states “While Blood lost Best Picture, it did win Oscars for two of its most prominent features: Daniel Day-Lewis’s unforgettable performance and the film’s stunning, sweeping cinematography.” The film won the Academy Award for best cinematography for Robert Elswit and best actor for Daniel Day-Lewis. The film set in southern California during the early 20th century and about the oil prospector named Daniel Plainview (Daniel Day-Lewis). Daniel the main character is told about a possible oil deposit by Paul Sunday while his twin Eli knowing this constantly tries to get $10,000 from Daniel for his church.
In order to reconstruct a crime scene, analysis must classify the bloodstain spatter, and there are many way to classify blood stain patterns: bloodstain spatter by velocity and bloodstain through taxonomy. In the classification of the bloodstain spatter by velocity, there are three basic categories of stain groups...
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...
National Institute of Justice (2004, June). Crime Scene Investigation: A Reference for Law Enforcement Training. Retrieved June 3, 2011, from http://www.ncjrs.gov/pdffiles1/nij/200160.pdf
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...
The topic I find such fascinating is Forensic Science and how forensic science has significantly changed over the years. “The area of forensic science has grown considerably over the last 150 years and more so since the mid 1980’s.” (Lyman, 2016) Forensic science has gone from taking basic information, and fingerprints to DNA and blood splatter. During a crime scene investigation evidence is collected, analyzed in a crime laboratory and then if needed are presented to the court. However, today the crime laboratory is becoming mobile and can go to the scene to analyze the evidence. Each crime scene and investigation is unique and distinctive, with the help of forensics it can help solve a case.
Blood spatter analysis is the blood evidence examined to draw a conclusion of how the incident may have occurred. This evidence also helps examine the patterns of the blood to see how