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Bloodstain Pattern Analysis Examples

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The human body runs on blood. Blood runs through the body carrying nutrients to where it needs to go. The blood of the human body is made up of millions of red blood cells, white blood cells, platelets, and is all carried in the plasma. Blood has special characteristics of movement when it exits the body. These characteristics can help a crime scene analyst solve a crime (O'Neil). In this log, one will learn about bloodstain pattern analysis and how it is used to help solve crimes. Bloodstain pattern analysis is portrayed throughout movies and television, most famously the television show Dexter. However, there is more to bloodstain pattern analysis than taking pictures and connecting string. There are three main categories of bloodstains: passive, transfer, and projected/impact stains. Passive stains can result from drops and pooling of blood, typically any stain that results from gravity acting on the injured body. Transfer stains can result from items coming in contact with an already existing stain, and swipes left behind and transfers such …show more content…

One main question that still remains is, when exactly did bloodstain pattern analysis first develop the idea of using inverse sine to calculate blood spatter? I found information on the man who originally thought about studying the bloodstain patterns at a crime scene, but when did the idea of inverse sine become involved? Inverse sine has been around for hundreds of years and is common for finding angles. So, I conclude that Eduard Piotrowski, the original creator of the idea of studying blood, tied the idea of inverse sine to blood patterns and discovered that the formula works for studying blood. Another question I have is, why after all of the time through history has innovators not come up with a better way to analysis bloodstains? Technology has advanced exponentially through the years. However, there has not been a way to analysis bloodstains

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There are different ways that prints can be developed in crime labs; by the use of traditional powders, fluorescent powders, chemicals, and superglue. They can be viewed under laser and UV lighting. When the finger print analysis was done on the magazine, Christopher Vaughn’s fingerprints did not show

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The Death of Anna Grace From the outside anna Garcia's house looks like any other house, but after looking closer we find a crime scene. The deceased body of Anna Garcia was found face-down in the hallway of her home. Pills, a tipped over chair, news paper, and a cup were found Many questions were raised what happened,who did it, and when. But the most important is how, how did Anna die.

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The morning of February 24, 2005, the grandmother of 9yr. old Jessica Lunsford called the police in Citrus County, Fla., to report her granddaughter had disappeared from her room the night before. She had tucked her into bed. The only thing that was missing was a stuffed animal that her father won for her at the county fair. Immediately police began to search for Jessica.

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1685 Words | 7 Pages

The first step is to place a drop of distilled water on a sterile swab and swab a small portion of the suspect substance, The place the swab against a presumptive blood test and an immediate color change should occur if the reaction is positive. If the stain is negative the suspected blood stain may be ignored. If the reaction is positive an evidence number is assigned to the suspected blood and the stain is photographed and measured. The forensic technician should note the stain was collected due to a positive reaction. The blood is then collected and packaged, and the package is sealed and labeled for identification Upon collecting blood if the blood is wet a sterile swab should be rotated in the stain, transferring the blood to the swab.

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1069 Words | 5 Pages

Bloodstains were also recovered from Laura’s mattress and other pillowcase through the use of the chemicals Ameeto Black and Luminol. The amount of blood found indicated to investigators that she had been murdered. In 1991, scientists at the Department of Forensic Medicine, Bern, Switzerland investigated if “Some of the commonly used presumptive test reagents for identification of blood and semen could potentially affect the recovery of intact high-molecular-weight de- oxyribonucleic acid (DNA) from evidentiary samples. Thus, the capability of performing restriction fragment length polymorphism (RFLP) analysis on evidentiary samples could be compromised.”

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One of the most notorious killers to ever be put behind bars with the help fingerprint evidence was the Night Stalker also known as, Richard Ramírez. This serial killer terrorized California with his brutal, year-long killing spree in which he murdered 14 individuals. Thanks in part to modern forensic technology and the discovery of this psycho’s fingerprints, police were able to put a swift end to his butchery before he could kill even more innocent people. Born on February 28, 1960 in El Paso, Texas, Richard Ramírez was the youngest of seven children to his parents, Mercedes and Julian Ramírez. His father Julian was a former Mexican police officer who moved to America and worked as a laborer on the railroad.

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On May 6, 2013, Tim Bosma took two men to a test drive of truck, and he disappeared. The Crown says he was shot in his truck, his body was then burned in an incinerator. These two men were Dellen Millard, 30, and Mark smich, 28. They are now on trial for first degree murder. Crown believes that Tim was shot fatally while sitting in the passenger seat of the truck, his body was later cremated.

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Have you ever wonder how does a crime scene investigator, known as a CSI, discover blood spatter on different fabrics, which is not visible to the human eye? The key is bluestar. According to the article “Influence of Bluestar Reagent on Blood Spatter Stain of Different Fabrics” by Arnon Grafit, bluestar is a “luminol-based reagent that is applied by spraying on surface.” Not only that, but “it helps obtain DNA and to analyze spatters patterns. By analyzing the article the reader is able to understand how bluestar works through the rhetorical techniques used.

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1172 Words | 5 Pages

Today, practical methods of using fingerprinting are extremely wide. In 1995, the size of the FBI fingerprint card archive contained over 200 million items, and archive size was increasing at the rate of 30,000 to 50,000 new cards per day [2]. Forensic science was the very first and most important area of its application, which still remains. The rapid development of computer technology has made it possible to create such fingerprint scanners that can be installed on laptops, cell phones, flash drives,

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This is known because suspect twos DNA traveled the same distance as the crime scene DNA. DNA Fingerprinting Using Agarose Gel Introduction In 1984 Dr. Alex Jeffreys came up with deoxyribonucleic acid (DNA) fingerprinting, which is also known as DNA profiling or DNA typing. DNA fingerprinting is the analyzing

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People need blood to live and every 2 seconds someone in the U.S needs blood. There are health and safety happening like someone choking, not breathing or having no pulse. There are steps you should do when you see anything wrong like an accident. 2. This is very widespread because there are many people are affected by natural disaster.

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Blood contains both slid and liquid form in our body and becomes a jelly like substance once it exits the body. A blood spatter deeply understands the proportion of blood and its various types. An analyst can describe how the blood came out of the body depending on the type of injury which took place. Blood can be looked like a flow, drip, spray, spurt or a gush (http://www.forensicsciencesimplified.org/blood/principles.html). Blood describes its velocity by its stains.

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DNA in forensic science The majority of cells making up the human body are diploid cells carrying identical DNA, with the exception of haploid gametes and red blood cells. Several types of biological evidence such as blood and hair are commonly used in forensic science, which is the scientific study of evidence for crime scene investigations and other legal matters. Forensic science is used for the purpose of DNA analysis, this is the analysis of DNA samples to determine if it came from a particular individual. DNA analysis is done by obtaining DNA samples from an individual; next, a large sample of DNA is produced from amplified selected sequences from the DNA collected.

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The human body is an amazing thing made up of many different parts. These parts are cells, tissues, organs, and organ systems. For starters, one type of cell makes up one type of tissue. Next, two or more types of tissues make an organ. Then, a few organs working together make an organ system.

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