Spatter Patterns Experiment

Physical evidence left behind at a crime scene plays a crucial role in reconstructing the events that took place involving the crime. Bloodstain pattern analysis (BPA) is a discipline which utilizes the sciences of biology, physics, and mathematics. Bloodstain interpretation may be accomplished by direct scene evaluation and/or careful study of scene photographs in conjunction with detailed examination of clothing, weapons, and other objects regarded as physical evidence. The location, spreading, and appearance of bloodstains and spatters can be useful for interpreting and reconstructing the events that produced the bleeding. An investigator or bloodstain pattern analyst can decipher from individual bloodstains the direction and angle

One of the most important purposes of physical evidence is to establish the identity of a suspect or victim. Some of the most valuable clues at a crime scene are fingerprints. "Processing a crime scene" is a long, tedious process that involves focused documentation of the conditions at the scene and the collection of any physical evidence that could possibly shed light on what happened and point to who did it.

The world of Forensic Scientist is an amazing and fascinating place. There are so many aspects that go into forensic science but in this paper we are only covering bloodstain spatter patterns. Bloodstain spatter patterns are not solely used to solve crimes but I do feel it is one of the most important. Bloodstains never lie.

All these elements are important in uncovering the truth behind a crime scene, and in a controlled environment seem simple. Implementing these techniques in an actual situation is more difficult as crime scenes are all unique. A multitude of elements need to be considered before forming an opinion from blood spatter. Spot size, quantity, shape, distribution, location, AOI, and target surface are only a few of these elements. As with other types of forensic science negative evidence can be used in BPI.

Blood spatter analysts are a crucial part of a homicide investigation. They examine the blood stains left behind at a crime scene with the help of criminal investigators. They try to find a pattern or trail with the blood to figure out what happened at the crime scene. These blood patterns can show where the victim was hit, how they were hit, if they struggled, and what kind of weapon the killer used. They use many techniques to collect evidence that can be analyzed at the lab. Common techniques are measuring the diameter of the blood drop, measuring the spatter zone, and taking pictures. Many analysts try to act out the homicide scene to piece together the crime scene and figure out what happened. They also sketch out the scene to go along

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.

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

There are different types of patterns that blood splatter makes. It can be a drop, a messy splatter, to just a little pool of blood it all just depends on what caused it to happen. Forensics and law enforcement officers can determine what kind of object was used in a murder case based on the blood splatter pattern.

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.

In 1894, Pitoroski wrote the earliest reference to blood-spatter analysis. In 1939, Balthazard was the first researcher to analyze the meaning of the spatter pattern. In 1955, blood-spatter evidence was used by the defense in the Sam Shepard case, helping to exonerate him. In 1971, Dr. Herbert MacDonnell used blood-spatter analysis as a tool in modern forensic examinations. Today, blood-spatter evidence is used to explain events at a violent scene.

To understand how analysts interpret bloodstains, one must first understand the basic properties of blood. Blood contains both liquid (plasma and serum) and solids (red blood cells, white blood cells, platelets and proteins). Blood is in a liquid state when inside the body, and when it exits the body, it does so as a liquid. However, this liquid state does not last very long after the blood leaves the body. Except for people with hemophilia, blood will begin to clot within a few minutes, forming a dark, shiny gel-like substance that grows more solid as time

As such it incorporates a vast array of disciplines, such as biology and physics and further applies this knowledge to the realm of forensic science (Bevel, & Gardner, 2008). BPA can be directly accomplished through the analysis of physical evidence at the crime scene in conjunction with photography, and/or through the thorough examination of other classes of physical evidence, such as weaponry and clothing (James, Kish, & Sutton, 2005). The analysis of bloodstain patterns provide the investigators of an incident with an extensive assortment of information relative to reconstructing the crime scene (Karger, 2008). Information provided can extend from the positioning of the victim during the bloodshed, the movements of the perpetrator, the mechanisms to which produced the bloodstains, and so forth (James, Kish, & Sutton, 2005). Therefore, the application of BPA assists the investigator in answering what events had occurred and in what sequential manner, where the events occurred and where people were situated, and what did not occur (James, Kish, & Sutton,

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,

Introduction: As seen on any crime scene investigation show, such as CSI Miami, traces of “cleaned up” blood left behind can been seen with the spray of a chemical called luminol. When applied on an area, it lights up where blood has been due to a chemical reaction. Chemiluminescence it is also found in the insect called fireflies 2. The reaction uses “ATP as an energy source”

After doing their job in he crime scene, the evidence they took will be taken to the forensic scientist. Crime scene investigators will look at the photographs and connect their theories based on the crime that occurred. The forensic scientists will also examine the victim’s clothes, while the medical examiner will analyze the victim’s body for more clues and evidence that they may find and they will all be doing this in the crime lab. The things they may find could be hair, fiber, semen, blood, another person’s DNA, bruises and many more. After the forensic scientists