Blood In Crime Scene Investigation

The understanding of blood spatter patterns is not a widely recognized forensic practice. Bloodstain pattern interpretation (BPI) is commonly used in murder investigations, but could be utilized in everything from simple assault to mass murders if the number of trained professionals increased. BPI can reveal critical information into reinventing a given crime scene. Everything from the number of blows, stabs or shots a victim was given, the movement that was undergone by the victim and assailant after bloodshed began, position of objects at the crime scene and the type of weapon, if any, that was used can be uncovered.

he Blood Spatter Analyst (also known as "Bloodstain Pattern Analyst") uses many techniques to collect and analze blood that has been left behind at a crime scene. They uses swabs and ultraviolet light, as well as photgraphy to collect and analyze trace evidence and recreate spatters. After analyzation of the spatter, they can determine what weapon was used, which direction the suspect or victim went, the number of wounds the victim suffered, the trajectry of a projectile, and what occured during a violent crime.

The topic for science fair is on blood spatter. If terminal velocity and height van affect the radius of a blood spatter print. To figure out whether after a blood splatter reaches terminal velocity and it starts to slow down will the radius start to become decrease. In this experiment the independent variable is the height the blood is dropped from, and the dependent is the radius of the blood spatter. Independent and dependent variables: The independent variable is the amount of sugar in each solution and the dependent variable is the levels of vitamin C the solution has.

Blood has many functions and is a complex structure of cells and fluid. It helps fight bacteria, protect the body from infection, carry valuable sources of minerals and nutrients around the body, dispose of waste materials, keeps the body temperature regulated and helps with glandular distribution of hormones and enzymes.

Blood is a red fluid that contains a complex mixture of cells suspended in a liquid matrix which is transported (circulated) throughout the body by the circulatory system of an organism. It circulates around the body by the heart and delivers oxygen and other important nutrients to cells of organs and tissues, while at the same time, removing waste product from our body. Blood is located in almost every part of our body, which is due to the network of blood vessels called the circulatory system. It is circulated through the body’s heart, arteries, veins and capillaries (tiny vessels that connect arteries and veins). In order for blood to carry out its functions, it needs to circulate all over our body to all living cells and tissues which it does through the support of the heart that pumps blood throughout our entire body). Thus, it is the fluid of life, a vital life force that all humans need in order to live and sustain life.

Bloodstain pattern analysis (BPA), known in the criminal justice field as blood splatter analysis, has been studied since the 1890s. Blood splatter, or bloodstain pattern constructional readings, is a technique that seeks to piece together the incident that caused an individual’s bleeding. Understanding blood splatter on a wall or various surfaces can be instrumental in formulating if a crime was committed and if the blood discovered at the crime scene can be used as evidence. The first documentation of blood splatter research occurred at the Institute for Forensic Medicine in Poland, by Dr. Eduard Piotrowski . During Dr. Piotrowski’s research and documentation period, where he used live bunnies to research blood splatter from head

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

Have you ever wondered how much a single blood splatter could impact a whole crime scene? In January 2004, Sachs and Jessica Snyder wrote an article titled, Blood is the Ink, Crime is the Story, which could be found in “Popular Science”. Blood spatter tells more of a story than most individuals know, including detectives and crime-scene analysis. A blood stained analysts, Paulette Sutton, informs those who do investigate crime how important a single blood stain is. An average everyday person could easily tell which direction the blood stain came from, and what height it had fallen from, nevertheless there is still more to the story.

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.

Blood is a circulating tissue consisting of three types of cells: red blood cells, white blood cells, and platelets. These cells are suspended in a liquid known as plasma. Plasma is similar to salt water in composition. It carries dissolved proteins, such as antibodies, hormones, and clotting factors, and nutrients such as glucose, amino acids, salts, and minerals.

lood. Sticky, hot, messy, awful blood. For most of us, the sight of it turns the stomach, but in the court of law, blood can tell a lot more about a crime scene than you might think. Forensic bloodstain pattern analysis (BPA) is the interpretation of bloodstains for the purpose of reconstructing the events that took place in the case of violent crimes. Using the sciences of fluid dynamics and trigonometry, BPA examiners form opinions about what did or did not happen by examining elements of the stains such as the size, shape, distribution and location of the bloodstains. Following the analysis of the crime scene, BPA examiners then prepare to present often-critical evidence to a jury in the court of law. “In many cases including here in Australia BPA is essential and pivotal to the investigation” and can contribute greatly to the outcome of a criminal trial under South Australian law.

Blood is a liquid connective tissue as it is made up of living cells (red and white). Oxygen is transported in red blood cells, attached to a protein called haemoglobin while nutrients, including glucose, are dissolved in the

Bloodstain pattern analysis (BPA) is a visually intensive forensic discipline that dedicates its resources to the deterministic signs of a violent crime (James, Kish, & Sutton, 2005). BPA seeks to define the facts surrounding an incident in question helping define an objective history for an event (Bevel, & Gardner, 2008). Bloodstain pattern analysis is based on a simple theory stating that the fluid characteristics of blood will react to any external forces in a predictable and plausible fashion. (James, Nordby, & Bell, 2014). In due course, these bloodstain patterns define the nature of the event that created them which subsequently the analyst evaluates to determine the "static aftermath" of the event (Bevel, & Gardner, 2008). In sum, BPA can be defined as a deductive and inductive analysis following the scientific method

First I’m going to look at how blood spatter analysis is used in processing a crime scene. There are many different points to blood spatter analysis such as; The interpretation of blood patterns found on items of clothing, this interpretation can help determine things like; the position of the victim, so whether they were standing,

Blood splatter can verify the position of the people involved in the crime, as well as give clues on how people were injured or died. Mainly, blood splatter eliminates many possibilities. It can show injuries the victim had, what happened as they were dying, and the angle the crime happened at (McShane) To further add on, blood splatter produces “spines” when dropped. Scientists determined that counting the “spines” determine what height and speed the blood fell down at (Powell). This can prove invaluable in crime. Not only does the blood splatter eliminate