Bloodstain: Analysis of Impact Patterns When violent crimes occur, it may result in bloodshed, this is where bloodstain pattern analysis comes in. Bloodstain pattern analysis examines the static aftermath of blood in motion and identifies size, shape, distribution, location of patterns to determine the physical events that occurred. The interpretation of bloodstains patterns can help determine origin of the bloodstain, position of the victim or suspect, direction of travel, impact angles, and reconstruct past events. The different type of bloodstain spatter patterns are: impact spatter, arterial spurt, cast off, drip trail and drip. Impact spatter is blood being acted upon by an amount of force. There are different levels of impact spatter …show more content…
This is consistent with what occurred at the scene, out victim JOHNSTON was standing by the wall when he was attacked from behind with a blunt force object.
References
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Vernon J. Geberth, M.S., M.P.S. author of the textbook, Practical Homicide Investigation: Tactics, Procedures, and Forensic Techniques, FOURTH EDITION, 2006. www.practicalhomicide.com/Research/LOmar2007-2.htm.
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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.
Fries, C. (2014). Precision Simulations, Inc. :: Topete Murder Trial. [online] Precisionsim.com. Available at: http://www.precisionsim.com/index.php/archive/topete-murder-trial/ [Accessed 18 May. 2014].
When a death occurs suddenly, unexpectedly and from unnatural or unknown causes, a forensic scientist has the duty to gather and analyze evidence to determine whether the victim died from a previously undiagnosed disease or infection or from a homicide, suicide or accident (Lurigio, 2009). When considering suicide as the probable cause of death, we are looking at the act of intentionally killing oneself through one’s own effort or with the assistance of another (Sever, 2009). The resolution of the manner of death by a forensic pathologist as suicide is based on a series of factors which eliminate natural causes of death, homicide and accident (Geberth, 2013, p.55). The cause of death is also determined by the medical examiner in conjunction with the crime scene investigator; however, it can only be determined after a thorough investigation is concluded. Therefore, in the complicated process of doing a death investigation there are several mistakes that should be avoided, which are discussed in Geberth’s article, Seven Mistakes in Suicide Investigation (2013). Mistakes in doing any death investigation affect the integrity of the evidence in determining the cause of death and in its admissibility in court.
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
Player: case report and emerging medicolegal practice questions. Journal of Forensic Nursing, 6(1), 40-46. doi:10.1111/j.1939-3938.2009.01064.x
Forensic toxicology is one of the oldest disciplines in forensic science history and dates back hundreds of years. However, the actual understanding and examination of forensic toxicology only dates back for about 200 years. Due to the development of technology, this discipline has been able to progress and flourish.
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
middle of paper ... ... Works Cited Soghomon Tehlirian | Murderpedia, the Encyclopedia of Murderers. Soghomon Tehlirian | Murderpedia, the Encyclopedia of Murderers. N.p., n.d. Web. The Web.
2. Kirsch, Laura. “Diagnosis: DEATH.” Forensic Examiner 15.2 (2006): 52-54. Criminal Justice Periodicals. ProQuest. USF Mears Library, Sioux Falls, SD. 24 Apr. 2008 http://www.proquest.com/
Peschel, O., Kunz, S. N., Rothschild, M. A., & Mützel, E. (2011). Blood stain pattern analysis. Forensic science, medicine, and pathology, 7(3), 257-270. http://link.springer.com/article/10.1007/s12024-010-9198-1
Holmes, R. M., & DeBurger, J. E. (1988). Serial murder. (Vol. 2). Sage Publications, Inc.
Through this research I have found that forensics and forensics anthropology work hand in hand. They seem to be closely related in regards (regards is an emotion, you mean regard) to solving criminal cases. A huge interest for me, while conducting this research is the impact the analysis has on cold cases. Cold cases are very important and require an extensive analysis of one’s life whose life? Mine?. Often victims in a cold case do not have strong family bonds, or persons that they are close to. It is imperative within life to have friends and persons, who will say something if you are not seen in a couple of days or weeks. Knowing where a person may be or what a person is involved is important in the case of a missing person. It is a vital part of forensics in relation to forensic anthropology. Within forensics anthropology you can find out more detailed information on the decomposition process. Steadman (2014) The information (what information?) can be used to identify a victim and maybe lead to clues of the perpetrator. New paragraph The study of a victim may also l...
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...
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...