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Blood spatter analysis
Forensic science chapter 8 blood and blood spatter
Blood spatter analysis research paper
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Blood splatter analysis also known as BPA, is to interpret the bloodstain from a crime scene. In the use of the blood splatter analysis it is design to examine how the blood was shed. Analysis examines the blood from the crime scene by gathering information on the shape, size, location, and distribution of where the blood was shed. With this information these analyst has these physical evidence to recognize the patterns and recreate them. From that point they will be able to say there opinions on what did or not happen. Some general features of these blood splatter formation is the direction from which the blood originated. A drop at an angle of impact of about 90 degrees will be circular in shape with no tail or build up of blood. The …show more content…
This has more energy or force. The blood breaks into a smaller size spatter depending on the force of impact. When it is broken into smaller spatters the diameter is about 2-4mm. You would usually see this blood spatter in a crime scene involving blunt force, stabbing, and secondary spatter. The third type of blood spatter is the high force impact spatter. This spatter measures less to about 2mm in diameter. In an incident you would usually see it in a gunshot, explosion, and high speed collision. It usually has a mist like appearance from its …show more content…
An article on a 2008 case of a father being the killer of his nine year old daughter (Mya Lyon) has speculated to be a push and pull over the story told. That is when they turned to blood spatter evidence to prove that Mya was stabbed in her father’s van and not in the alley that Lyon stated he found his daughter in. On July 2008, Richard Lyons screams as he found his daughter in the alley dead. Being pronounced dead, she was stabbed multiple times. Lyon stated that after discovering her body he took her into the van with his uncle to the hospital. Until the physical evidence raised questions on Lyons story of his daughter’s
On June 19th of 1990, Robert Baltovich’s girlfriend Elizabeth Bain went missing. Elizabeth told her family that she was going to check the tennis schedules at her school, the University of Toronto Scarborough Campus. She never returned, but her car was eventually recovered. It was found with blood on the backseat, with forensic tests showing that it was Elizabeth’s. With no clear evidence, the “solving” of the case was completely based on eyewitness testimonies, which eventually had Robert arrested for the murder of his girlfriend.
With Every Drop Of Blood by James Lincoln Collier and Christopher Collier is based on the Civil War. In this novel they talked about the white-black relationships during this time period. In the novel Johnny’s father went off to fight in the war, and was shot at Cedar Creek to be sent back home for a short amount of time before he passed due to his injuries. When Johnny’s father died Johnny promised him that he would not run off to fight, that he would stay and help his mother with the farm, the house, and Johnny’s little brother Sam and his little sister Sarah. Before Johnny’s father passed Johnny asked him what the reason for the war was, and his father told him it was for ‘states rights’.
A horrific murder happened in tiny Skidmore on December of 2004. Lisa Montgomery and Bobbi Jo Stinnett met and found out that they had much in common and became good friends (Nunes 85-86). Surprisingly, Bobbi and Lisa met in an internet chat room. Bobbi was into puppy breeding and she occasionally served as a judge. Lisa lived in Kansas where her close friends were shocked about what she was talking about. Of course, Lisa shrugged it off and she sent an email to Bobbi saying that she wanted to see the puppies (Nunes 85-86). When Lisa met Bobbi Jo she had a fake name which was Darlene Fisher because she didn’t want Bobbi to know her real identity. When Lisa sent Bobbi the email she had a criminal intent on her mind. She was planning to choke Bobbi into unconsciousness and then cut open her womb and steal Bobbi’s unborn baby. When Lisa arrived at the house she threw a rope around Bobbi’s neck and choked her until she was unconscious. That is when Lisa took a knife and started to cut open Bobbi’s stomach. Lisa had to cut through skin, fat, and muscle to get to Bobbi’s uterus. Bobbi’s baby was in eight-month gestation; Lisa cut and tied the baby’s cord. Lisa stole the baby and fled to her house in Kansas. Unfort...
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...
Sue Grafton once stated: “Except for cases that clearly involve a homicidal maniac, the police like to believe murders are committed by those we know and love, and most of the time they're right.” This is clearly the thought the Boulder Colorado police conceived in the case of little beauty queen JonBenet Ramsey. As many have observed from the onslaught of media coverage, the day after Christmas 1996, six year old Jon Benet Ramsey was found buried under a white blanket, bound, beaten, and strangled to death in the wine cellar of their Boulder home. With such a strikingly rare and glamorous story of a six year old beauty queen dead, who was a part of a “perfect American upper-middle class family”, combined with a lack of a lead and ever mounting suspicion piling up against the parents it was no surprise to find that it was fuel to the media and soon stories sold and became a matter of competition between the press. So, like wildfire, this heart-breaking story spread, stretching across the nation, shattering the souls of the world. News broadcasts, magazine and newspaper articles, and television specials all shaped and molded peoples perceptions of this beautiful child’s murder, especially her parents, John and Pasty Ramsey’s involvement or lack there of. The police and FBI’s merciless quest to connect Jon Benet’s murder to her parents, seemed to cause the them to overlook important evidence, or at the very least dismiss suspicious findings that would otherwise send red flags to investigators. There are many contributors as to why this case remains unsolved including lack of investigative expertise, failure to protect valuable evidence, and focusing too much on the parents as suspects but, ultimately, the over involvement of...
The Web. 28 Feb 2014 Christopher, Liam. “Mother ‘vindicated’ after girl’s murder suspect held.” Daily Post. 18 Aug. 2006: 19:. Proquest Newsstand.
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 ...
Many people throughout the world visit the United States every year to receive medical treatment. This is due to our excellent pharmaceutical industry as it spends million of dollars and many hours of research to come up with what we can only describe as “miracle” drugs and treatments. Part of the success of many of these medications is because the pharmaceutical industry is highly regulated by policies that protect the public from accessing drugs that have not been fully tested and found to be “safe”. However, this was not the case until the late 1990s and early 2000s. One time in history that highly influenced the strict regulations we currently have was the nationwide contamination of patients through blood transfusion or by consuming medications
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 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 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.
Strangers passing by could mean they want to help or they could hurt you. Andy is laying on the sidewalk bleeding and is being passed by many strangers but none helped. Evan Hunter is the author for "On the Sidewalk Bleeding”. Andy was stabbed for being apart of the gang the Royals and strangers were passing by him but not helping him. They were not helping him because they seen that he had a Royals jacket on so if they helped him he thought the other gang qthe Guardians would be after them. While Andy is on the sidewalk bleeding he is thinking about his girlfriend Laura and how he will miss her and she will miss him. Evan Hunter uses mood/tone in his story of "On the Sidewalk Bleeding" to convey the theme of murder usually leads to misery
Then, put your mouth on the area and suck the skin. The blood will come to the opposite side of the skin and it will create a red mark. It will stay there
The purpose of this experiment was to see the effects of angle and height on the shape of blood splatter. I hypothesized that as heights and angles are changed the shape of each splatter would change. Simulated blood was created with corn syrup, cornstarch, and food coloring, then put into dropper. The dropper was mounted onto projectile launcher for exact angle measures. With the setup the blood was then dropped in different angles and heights. As each splatter was checked, the shape changed minimally and remained a circular shape. Thus it can be concluded that, angle and height as variables isn’t enough to differentiate the shape of blood splatter.
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,