899:) is often made with a weapon and can create cast-off patterns. They are often made at between 5 and 25 feet/second the blood droplets ranging from 1 to 4 millimeters in length. Low-velocity spatters are usually created just as a result of blood dripping from the individual (i.e., gravity). They can also be referred to as passive or gravity bloodstains (bloodstain patterns that are formed under the influence of gravity), and are separated further into four categories: transfer/contact stains, flow artefacts, drop stains, and pooling. Transfer stains occur when two surfaces come into contact and at least one has blood on it, and it includes swipe and wipe patterns, which can give information regarding sequence of movement in some cases. Pooling occurs when the source of the bleeding remains static for a certain period of time, the blood continuously dripping in the same location and resulting in an important accumulation. If the individual who is actively bleeding moves while blood is dripping, the resulting pattern will allow for determination of direction and relative speed of movement at that time. Cast-off patterns are associated with impact spatter. These patterns arise from blood being ejected from a bloodied or bleeding object during its movement, commonly observed in incidents involving physical assaults or strikes. They are commonly observed on ceilings when objects are swung overhead, although they can potentially appear on any surface within the surrounding area. These patterns may be used to guess the direction of a weapon swing. In these cases, the length and the shape of the bloodstain patterns can help determine the speed of the swing. These patterns create elongated or elliptical shapes in blood when it hits the surface of an object. In 1895, Dr. Eduard Piotrowski's experiment showed that these patterns are often created after the second hit using the weapon. In some cases, void or shadow patterns can be observed. It is the result of a person or an object shielding an area from the blood coming toward it, and it is characterized by a clean area where bloodstains are expected. It can help determine if whatever intercepted the blood has been moved since the incident occurred.
774:
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of force behind it; variations in external forces can cause satellite drops. A point of origin can be determined by finding what bloodstain analysts call the "area of convergence" for the blood droplets. To find this point of origin, the shape of the blood and the length are often taken into account and the stringing method is implemented. In the stringing method, blood drop paths are depicted as straight lines. Strings are placed at the bloodstain positions and pulled away from the surface to reconstruct the direction of impact. This direction is determined by the shape and orientation of the bloodstains. The point where most strings intersect is considered the estimated location of the blood source. There is also a method known as the tangent method. In this method, the blood drops' paths are seen as right-angled triangle hypotenuses. This works best for fast-moving drops with flat trajectories, but uncertainties in their curvature may lead to errors in determining the blood source's horizontal position."
973:, who was tried three times for the murder of his family largely on the basis of blood spatter evidence, both prosecution and the defense used expert bloodstain pattern analysts to interpret the source of the approximately 8 drops of blood on his shirt. The prosecution's experts included Tom Bevel and Rod Englert, who testified that the stains were high-velocity impact spatter. Paul Kish, Barton Epstein, Paulette Sutton, Barrie Goetz, and Stuart H. James testified for the defense that the stains were transferred from his shirt brushing against his daughter's hair. Dr. Robert Shaler, Founding Director of the Penn State Forensic Science Program, decried blood spatter analysis as unreliable in the Camm case. "The problem, in this case, is the number of stains minimal," he said. "I think you're really on the edge of reliability." All of the blood spatter analysts involved in the case are "
911:, which found the method of analysis to be "subjective rather than scientific", and that it involved an "enormous" degree of uncertainty. In addition to concerns over methodology, the report criticized the lack of proper certification requirements for analysts and an emphasis on "experience over scientific foundations". Many bloodstain pattern analysts have testified in court as experts despite having received training only in the form of a 40-hour course taught independently by MacDonell or one of his students, without institutional accreditation or minimum educational requirements. Even with proper training and methods, there are still many times where reputable analysts disagree on their findings, which calls into question the reliability of their conclusions and its value as evidence in court.
48:
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testified that, rather than being a suicide as believed for a number of reasons by police, it was a murder due to the pattern of small blood flecks found on the accused, which according to the analyst had to have come from "high velocity" blood from a gunshot, rather than blood that simply got on him through his attempts to provide medical aid to the victim. Other bloodstain pattern analysts have since disputed this claim and said that the bloodstains were consistent with medical aid. The original analyst has conceded that his claim is not as strong as he originally presented it as being, although he still believes in
Horinek's guilt. As of 2017, Horinek remains in prison.
523:) is a forensic discipline focused on analyzing bloodstains left at known, or suspected crime scenes through visual pattern recognition and physics-based assessments. This is done with the purpose of drawing inferences about the nature, timing and other details of the crime. At its core, BPA revolves around recognizing and categorizing bloodstain patterns, a task essential for reconstructing events in crimes or accidents, verifying statements made during investigations, resolving uncertainties about involvement in a crime, identifying areas with a high likelihood of offender movement for prioritized DNA sampling, and discerning between homicides, suicides, and accidents.
20:
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impact spatter aided in the conviction of David Camm. Dr. Shaler pointed out that one limitation of blood spatter analysis testimony is that "you do not have the supporting underlying science" to back up your conclusions. When Stites testified, the jury had no way of knowing that he was not the expert that he purported to be. Even among the expert witnesses, it is unknown which set of experts interpreted the stains accurately as there is no objective way of determining which bloodstain pattern analyst has applied the science correctly.
895:
blood is projected back at an attacker, while forward spatter is blood that exits directly from the victim's wound and projects onto nearby surfaces. The speed of the weapon used in the attack can cause changes in the size of blood spatter. The speed of the attack is classified into high, medium and low velocity attacks. High-velocity spatter (e.g., gunshot wounds) create small-sized droplets. High-velocity spatter usually travels 100 feet per second and creates blood droplets sized 1 millimeter or less. Medium-velocity spatter (e.g.,
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571:(first published in 1941 and updated occasionally through at least the 1970s) also briefly mentioned details that later bloodstain experts would expand upon (e.g., that blood dries at a relatively predictable rate; that arterial blood is a brighter red color than other blood; that bloodstains tend to fall in certain patterns based on the motion of an attacker and victim). A 1952 episode of the
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observable characteristics, complicating the analysis process. Ideally, BPA involves meticulous evaluation of pattern characteristics against objective criteria, followed by interpretation to aid crime scene reconstruction. However, the lack of discipline standards in methodology underscores the need for consistency and rigor in BPA practices.
741:. It also lowers with a higher shear, which is why it is classified as a shear-thinning, non-Newtonian fluid. This is why blood appears more watery when it hits a surface than right after it leaves the body. The closer the shear rate is to zero, the more viscous the blood is. Some other factors can also influence blood viscosity.
630:, and which also published his research in the book "Flight Characteristics and Stain Patterns of Human Blood" (1971). MacDonell testified in court on multiple occasions as an expert of bloodstain analysis, and the legal precedent set by these cases led to its widespread use in American courts, although as early as 1980 some
914:
There is very little empirical evidence to support the use of blood spatter analysis in court or any other aspect of the legal system. While certain aspects of bloodstain pattern analysis, such as methods for determining the impact speeds of splattered blood, are supported by scientific studies, some
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Our results show that conclusions were often erroneous and often contradicted other analysts. On samples with known causes, 11.2% of responses were erroneous. The results show limited reproducibility of conclusions: 7.8% of responses contradicted other analysts. The disagreements with respect to the
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Additionally, the angle of impact as well as other external factors such as the material on which the blood falls can change the shape and size of the blood. The point of impact can change the shape of the bloodstain. Bloodstains, instead of maintaining their original forms, may become elongated. In
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A bloodstain can present itself differently depending on the situation and the material on which it appears, and bloodstains may be hard to examine on porous surfaces such as fabric, and may be distorted. Bloodstain pattern analysts consider the angle of impact to determine its origin and the amount
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Bloodstain pattern analysis has been used informally for centuries, but the first modern study of blood stains was in 1895. Dr. Eduard
Piotrowski of the University of Kraków published a paper titled "On the formation, form, direction, and spreading of blood stains after blunt trauma to the head." He
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Impact spatter is the most common bloodstain pattern type in a crime scene. It occurs when an object hits a source of blood. In impact blood spatter patterns, blood is often circular and not elongated. There are two types of impact spatter, back spatter and forward spatter. Back spatter occurs when
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case in 1966, when the wife of an osteopathic physician was beaten to death in her home, interpreting bloodspatter evidence as proof that the murderer was left-handed (Sheppard was right-handed). However, bloodstain pattern analysis would not begin to enter wide use until it was promoted by
Herbert
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Further complicating matters was the testimony of Rob Stites, who testified for the prosecution as an expert blood spatter analyst. It was later uncovered that he had no training and his credentials were fabrications by the prosecutor. His testimony that the blood on Camm's shirt was high-velocity
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Other times, bloodstain patterns from different causes can mimic each other. In the 2008 trial of Travis Stay for the murder of Joel
Lovelien, prosecution witness Terry Laber testified that the blood spatter on Stay's clothing came from blows to Lovelien during a fist fight. After a review of the
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A 1995 murder case against Warren
Horinek was largely decided based on bloodstain evidence that has been hotly disputed after the fact. The police and the district attorney's office believed in Horinek's innocence. The appointed attorneys for the prosecution found a bloodstain pattern analyst who
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report concluded that "the uncertainties associated with bloodstain pattern analysis are enormous" and that purported bloodstain pattern experts' opinions are "more subjective than scientific." The report highlighted several incidents of blood spatter analysts overstating their qualifications and
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Despite its importance, classifying bloodstain patterns poses challenges due to the absence of a universally accepted methodology and the natural uncertainty in interpreting such patterns. Current classification methods often describe pattern types based on their formation mechanisms rather than
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The first formal bloodstain training course was given by MacDonell in 1973 in
Jackson, Mississippi. MacDonell taught workshops on how to conduct bloodstain analysis, and the newly trained bloodstain analysts, who often had received as little as 40 hours of instruction, in turn would give expert
736:
describes the relation between force applied on the fluid and the rate at which the fluid particles can be separated from each other, or deformed. If a fluid has a high viscosity, it will not flow as easily as a fluid with a lower viscosity. Because this relates directly to the strength of the
533:
Grounded in principles of physics, biology, chemistry, and medicine, bloodstain pattern analysts use a variety of different classification methods. The most common classification method was created by S. James, P. Kish, and P. Sutton, and it divides bloodstains into three categories: passive,
699:
When a blood vessel is damaged, the blood starts moving outside the circulatory system, following the laws of physics. If this leaking blood ever reaches the surface of the skin, it will be externalized and will likely come into contact with the person's surroundings. Some of the most common
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as a theoretical framework for solving these problems, and
Attinger has continued to publish several papers exploring these concepts (as have other scientists as well). However, these papers are largely theoretical, and have had little impact on the use of bloodstain analysis in courts.
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analysts go well beyond what is verifiable. In addition to problems with the underlying scientific validity of the method, the circumstances of bloodstain pattern analyses, which are often conducted at the behest of either the prosecution or the defense in a court case, can introduce
773:
758:(e.g., blood and air). This plays a big role in the formation of spherical blood droplets as they fall, as well as the way they react when they hit a surface. Surface tension can also be affected by outside factors such as temperature and the presence of chemicals in the blood.
943:
meaning and usage of BPA terminology and classifications suggest a need for improved standards. Both semantic differences and contradictory interpretations contributed to errors and disagreements, which could have serious implications if they occurred in casework.
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courts which harshly criticized both bloodstain pattern analysis and the credentials of the majority of the analysts and experts in the field. Judges have largely ignored the report's findings and continue to accept bloodstain pattern analysis as expert evidence.
1531:"Judging from the bloodstains found on the furniture and rug in the living room, and on the front steps of the cottage, Radford had first been shot while he was in the living room..." Quote starts at about 12 minutes and 17 seconds into the episode. "
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in the traditional sense. Quoting Shaler, "We have two opinions in this case. That, in essence, is a 50 percent error rate. " This would be an unacceptable level of reliability in a court case given that the perception of
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conducted his first experiments on rabbits. A number of publications describing various aspects of blood stains were published, but his publication did not lead to a systematic analysis. LeMoyne Snyder's widely used book
937:
The study was based on 33,005 multiple-choice responses and 1760 short text responses, by 75 practicing bloodstain pattern analysts on 192 bloodstain patterns selected to be representative of casework, and stated:
1998:
Neitzel, G. Paul, and Marc K. Smith. The Fluid
Dynamics of Droplet Impact on Inclined Surfaces with Application to Forensic Blood Spatter Analysis. Washington, D.C: Office of Justice Programs, 2017. Print.
678:, finding that many of the central hypotheses of bloodstain analysis remain untested, and that existing analysts often made incorrect assumptions or other errors in their analyses. The paper also proposed
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evidence by Paul Kish, another bloodstain pattern analyst, Laber reviewed the report submitted by Kish and revised his findings to include the possibility that the blood came from expiration by
Lovelien.
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questioned the reliability of their methods. In 2021, the largest-to-date study on the accuracy of BPA was published, with results "show that were often erroneous and often contradicted other analysts."
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Hicklin, R. Austin; Winer, Kevin R.; Kish, Paul E.; Parks, Connie L.; Chapman, William; Dunagan, Kensley; Richetelli, Nicole; Epstein, Eric G.; Ausdemore, Madeline A.; Busey, Thomas A. (1 August 2021).
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these cases, the blood may have a tail capable of indicating directionality. In order to find the angle of impact investigators measure the length and width of the blood droplet and use the formula
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reviewed cases that had used bloodstain pattern analysis, and consequently established that starting in 2019, bloodstain pattern analysts will need accreditation to testify as experts in
764:(denoted by d) represents a fluid's mass per unit volume, which allows for comparison between substances. The reference for comparison is usually water since it has a density of 1 g/cm.
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rejected expert testimony for bloodspatter analysis, generally holding that it added nothing to the jurors' own evaluations of bloodstains submitted as evidence. In 1957, the
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The validity of bloodstain pattern analysis has been questioned since the 1990s, and more recent studies cast significant doubt on its accuracy. A comprehensive 2009
530:), and mathematical calculations to reconstruct with accuracy events at a crime scene, and these claims have been accepted by the criminal justice system in the US.
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expressed strong doubts about its reliability, and it was not always accepted as evidence, especially in states with no prior rulings that relied on such evidence.
643:
2078:"3D bloodstain pattern analysis: Ballistic reconstruction of the trajectories of blood drops and determination of the centres of origin of the bloodstains"
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Blood is composed of three components suspended in plasma: erythrocytes (red blood cells), leukocytes (white blood cells), and thrombocytes (platelets).
717:
Since blood is 55% plasma (and 45% solid components suspended in plasma), it is an aqueous liquid and behaves as such. More specifically, it is a
1706:
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The reliability of courtroom testimony by bloodstain pattern analysts has come under fire, particularly in the wake of a 2009 report by the
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BPA Subcommittee aim to establish standards for training, terminology, quality assurance, and procedure validation within the discipline.
1244:"The Reliability of Pattern Classification in Bloodstain Pattern Analysis, Part 1: Bloodstain Patterns on Rigid Non-absorbent Surfaces"
503:
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Starting in 1995, court cases where bloodstain analysts disagreed with each other raised concerns of the discipline's prediction's
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describes the energy required to change the shape of a fluid when it comes into contact with another fluid in which it is not
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1976:
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to make a blood pattern analysis, quickly realizing by his puzzled expression that in 1973 such techniques are not known.
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became the first
American court to accept expert testimony examining bloodstains, accepting as evidence the testimony of
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was founded by a group of blood stain analysts to help develop the emerging field of bloodstain pattern analysis.
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attraction between the fluid molecules, viscosity of blood decreases with increasing temperature and decreasing
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Williams, Elisabeth M. P.; Graham, Emma S.; Jermy, Mark C.; Kieser, David C.; Taylor, Michael C. (March 2019).
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The Fluid Dynamics of Droplet Impact on Inclined Surfaces with Application to Forensic Blood Spatter Analysis.
1845:
Yadav, Siddharth Singh; Sikarwar, Basant Singh; Ranjan, Priya; Janardhanan, Rajiv; Goyal, Ayush (2020-07-03).
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Laan, Nick; de Bruin, Karla G.; Slenter, Denise; Wilhelm, Julie; Jermy, Mark; Bonn, Daniel (September 2015).
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2117:"Bloodstain Pattern Analysis: implementation of a fluid dynamic model for position determination of victims"
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2378:"The Dynamics of Blood Drop Release from Swinging Objects in the Creation of Cast-off Bloodstain Patterns"
674:, a fluid dynamics researcher at Columbia University, published a paper on bloodstain pattern analysis in
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Buck, Ursula; Kneubuehl, Beat; Näther, Silvio; Albertini, Nicola; Schmidt, Lars; Thali, Michael (2011).
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1743:"Fluid dynamics topics in bloodstain pattern analysis: Comparative review and research opportunities"
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Homicide Investigation: Practical Information for Coroners, Police Officers, and Other Investigators
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In 2021, the largest study to date on the accuracy of bloodstain pattern analysis was published in
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19:
2233:"An automated approach to the classification of impact spatter and cast-off bloodstain patterns"
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Taylor, Michael C.; Laber, Terry L.; Kish, Paul E.; Owens, Glynn; Osborne, Nikola K. P. (2016).
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A number of court cases are controversial due to their reliance on bloodstain pattern analysis:
2691:
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Attinger, Daniel; Moore, Craig; Donaldson, Adam; Jafari, Arian; Stone, Howard A. (2013-09-10).
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2010:"Determining the area of convergence in Bloodstain Pattern Analysis: A probabilistic approach"
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Ueber Entstehung, Form, Richtung und Ausbreitung der Blutspuren nach Hiebwunden des Kopfes
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Transfer or alteration resulting from two surfaces coming into contact (swipe, wipe, etc.)
8:
1205:"A novel, element-based approach for the objective classification of bloodstain patterns"
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Arthur, Ravishka M.; Cockerton, Sarah L.; de Bruin, Karla G.; Taylor, Michael C. (2015).
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The National Forensic Science Technology Center (NFSTC), Florida International University
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Arthur, R.M.; Hoogenboom, J.; Baiker, M.; Taylor, M.C.; de Bruin, K.G. (August 2018).
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1369:"Accuracy and reproducibility of conclusions by forensic bloodstain pattern analysts"
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External force applied at the source of the bleeding (e.g., being hit with a weapon)
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An internal source applying pressure on the blood (expiration, blood pressure, etc.)
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Since the late 1950s, BPA experts have claimed to be able to use biology, physics (
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39:
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Bremmer et al., Biphasic Oxidation of Oxyhemoglobin in Bloodstains. PLoS ONE 2011.
1924:
1862:
1847:"Surface tension measurement of normal human blood samples by pendant drop method"
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made reference to bloodstain pattern analysis to reconstruct a shooting incident.
1966:
1936:
671:
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339:
85:
2288:"Prediction of blood back spatter from a gunshot in bloodstain pattern analysis"
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2585:
Bloodstain Pattern Analysis With an Introduction to Crimescene Reconstruction
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is a blood spatter analyst for the fictitious Miami Metro Police Department.
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Shows how to determine area of convergence from blunt trauma blood spatter.
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1901:"Density | Definition, Symbol, Units, Formula, & Facts | Britannica"
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Diagram showing how to calculate the area of origin of a blood splatter
738:
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Leon MacDonell. MacDonell researched bloodstains with a grant from the
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Strengthening Forensic Science in the United States: A Path Forward
2286:
Comiskey, P. M.; Yarin, A. L.; Kim, S.; Attinger, D. (2016-08-02).
1965:
James, Stuart H.; Kish, Paul E.; Sutton, T. Paulette (2005-05-26).
1323:
Strengthening Forensic Science in the United States: A Path Forward
590:
2026:
1010:, the time-travelling detective in episode 3 of the BBC TV series
2682:
International Association of Bloodstain Pattern Analysts (IABPA)
2591:
James, Stuart H.; Kish, Paul Erwin; Sutton, T. Paulette (2005).
2629:
Shooting Incident Investigation/Reconstruction Training Manual
1968:
Principles of Bloodstain Pattern Analysis: Theory and Practice
1844:
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Principles of Bloodstain Pattern Analysis: Theory and Practice
2657:, 3rd edition. Saunders College Publishing, Fort Worth, 1993.
1420:
Text was copied from this source, which is available under a
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James, Stuart H.; Kish, Paul E.; Sutton, T. Paulette (2005).
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1931:, Chichester, UK: John Wiley & Sons, Ltd, 2009-04-17,
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1790:"Physical Parameters of Blood as a Non - Newtonian Fluid"
2488:. The National Academies Press. 2009. pp. 177–179.
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Further investigation into its admissibility as evidence
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International Association of Bloodstain Pattern Analysts
877:
How to calculate the point of origin of a blood spatter
2686:
2662:
Bloodstain Pattern Interpretation, Short Course Manual
1490:
SIAK-Journal − Journal for Police Science and Practice
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1422:
Creative Commons Attribution 4.0 International License
1326:. Washington, DC: The National Academies Press, 2009.
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SIAK-Journal − Journal for Police Science and Practice
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SIAK-Journal − Journal for Police Science and Practice
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Interpretation of Bloodstain Evidence at Crime Scenes
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800:
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published an examination of forensic methods used in
2681:
1572:"How a Dubious Forensic Science Spread Like a Virus"
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1294:"How a Dubious Forensic Science Spread Like a Virus"
1241:
585:
Acceptance as valid evidence in United States courts
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862:
2650:Washington, DC: Office of Justice Programs, 2017.
1525:
1072:A Simplified Guide To Bloodstain Pattern Analysis
543:Organization of Scientific Area Committees (OSAC)
2755:
2536:"David Camm blogsite: Our own little experiment"
1361:
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1357:
2590:
1964:
1851:Journal of Medical Engineering & Technology
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725:. Here are its three main physical properties:
1589:
1535:", April 3, 1952; no script writer identified.
1344:"Science found wanting in nation's crime labs"
23:Examples of blood-spatter and droplet patterns
1660:"Blood Spatter Evidence Not an exact Science"
1598:"Introduction to bloodstain pattern analysis"
1522:. Charles C. Thompson Publishers, 3rd Edition
1486:"Introduction to Bloodstain Pattern Analysis"
1449:"Introduction to bloodstain pattern analysis"
1354:
1163:"Introduction to Bloodstain Pattern Analysis"
1094:"Introduction to Bloodstain Pattern Analysis"
1048:are blood spatter analysts on the CBS series
497:
2517:"Bloody Injustice – The Warren Horinek Case"
2704:– database of BPA-related research articles
2664:, University of Tennessee, Memphis TN 1998
1794:International Journal of Biomedical Science
2687:Association for Crime Scene Reconstruction
947:
504:
490:
2595:Principles of Bloodstain Pattern Analysis
2342:, CRC Press, pp. 17–24, 2001-06-27,
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2025:
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2671:. John Wiley & Sons, New York, 1982.
2521:Law Office of Walter M. Reaves, Jr., P.C
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18:
2692:Bloodstain Pattern Analysis Terminology
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2533:
1605:Journal for Police Science and Practice
1456:Journal for Police Science and Practice
870:. The (A) representing angle of impact.
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2599:(3rd, illustrated, revised ed.).
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1929:Wiley Encyclopedia of Forensic Science
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1561:
1479:
1477:
2653:Solomon, Berg, Martin, & Villee.
2639:James, Stuart H.; Eckert, William G.
2577:
2557:Kircher, Travis (24 September 2013).
2475:
2473:
2471:
2469:
1788:Baieth, H. E. Abdel (December 2008).
1736:
1734:
1732:
1730:
1728:
1726:
1682:
1680:
1653:
1651:
1649:
1569:
1559:
1557:
1555:
1553:
1551:
1549:
1547:
1545:
1543:
1541:
1341:
1332:
1316:
1314:
1291:
1287:
1285:
1198:
1196:
1156:
1154:
1152:
1150:
1001:
2702:Bloodstain Pattern Analysis Research
2445:10.1093/acref/9780199594009.001.0001
2430:
2008:Camana, Francesco (September 2013).
1087:
1085:
1083:
2173:
2066:
1985:
1474:
1342:Moore, Solomon (February 4, 2009).
863:{\displaystyle sin(A)=width/length}
768:
628:United States Department of Justice
13:
2534:Kircher, Travis (3 October 2013).
2466:
1723:
1677:
1646:
1538:
1311:
1282:
1193:
1147:
541:Efforts by organizations like the
14:
2785:
2675:
1570:Smith, Leora (13 December 2018).
1292:Smith, Leora (13 December 2018).
1080:
955:
924:Texas Forensic Science Commission
881:
589:Between 1880 and 1957, courts in
2741:
2729:
2717:
2559:"David Camm blogsite: Uncle Sam"
2437:A Dictionary of Forensic Science
2203:10.1016/b978-012370482-5/50059-8
1415:
561:
405:Traffic collision reconstruction
46:
2646:Neitzel, G. Paul; Smith, Marc.
2550:
2527:
2509:
2424:
2369:
2328:
2279:
2249:10.1016/j.forsciint.2018.05.019
2224:
2191:"Section II: Case Applications"
2108:
2094:10.1016/j.forsciint.2010.06.010
2036:10.1016/j.forsciint.2013.04.019
2001:
1958:
1917:
1893:
1838:
1781:
1759:10.1016/j.forsciint.2013.04.018
1699:
1386:10.1016/j.forsciint.2021.110856
1221:10.1016/j.forsciint.2015.08.028
935:Forensic Science International.
919:into the analyst's assessment.
621:. He would also testify in the
258:Questioned document examination
2643:, 2nd Edition, CRC Press 1999.
2313:10.1103/physrevfluids.1.043201
2237:Forensic Science International
2082:Forensic Science International
2014:Forensic Science International
1747:Forensic Science International
1373:Forensic Science International
1235:
1209:Forensic Science International
1120:
1065:
1051:CSI: Crime Scene Investigation
992:
816:
810:
676:Forensic Science International
1:
2583:Bevel, Tom; Gardner, Ross M.
1863:10.1080/03091902.2020.1770348
1058:
969:In the criminal case against
964:
691:
642:in court cases. In 1983, the
2431:Bell, Suzanne (2013-04-18),
2382:Journal of Forensic Sciences
1937:10.1002/9780470061589.fsd185
1688:Travis Stay found not guilty
1248:Journal of Forensic Sciences
909:National Academy of Sciences
890:Cast-off blood stain pattern
660:National Academy of Sciences
550:National Academy of Sciences
7:
2439:, Oxford University Press,
2195:Bloodstain Pattern Evidence
1320:National Research Council.
902:
517:Bloodstain pattern analysis
76:Bloodstain pattern analysis
10:
2790:
2669:Elementary fluid mechanics
2340:Ethics in Forensic Science
556:
2698:terminology with examples
2587:, 3rd Ed. CRC Press 2008
2189:Wonder, Anita Y. (2007),
1437:(Vienna, Austria: 1895).
983:beyond a reasonable doubt
656:admissibility as evidence
375:Fire accelerant detection
2197:, Elsevier, p. 48,
1596:Brodbeck, Silke (2012).
1518:Snyder, LeMoyne (1971).
1484:Brodbeck, Silke (2012).
1447:Brodbeck, Silke (2012).
1161:Brodbeck, Silke (2012).
1092:Brodbeck, Silke (2012).
607:California Supreme Court
2394:10.1111/1556-4029.13855
2348:10.1201/9781420041620-5
1806:10.59566/IJBS.2008.4323
1658:Kozarovich, Lisa Hurt.
1260:10.1111/1556-4029.13091
948:Relevant case histories
658:in court. In 2009, the
278:Social network analysis
2292:Physical Review Fluids
945:
891:
878:
864:
786:
778:
569:Homicide Investigation
534:spatter, and altered.
360:Electrical engineering
24:
2660:Sutton, Paulette T.,
1016:, asks his colleague
985:is what is required.
940:
889:
876:
865:
784:
776:
390:Materials engineering
218:Facial reconstruction
22:
2769:Forensic disciplines
2667:Vennard, John King.
1636:"A Bloody Injustice"
798:
687:The physics of blood
435:Perry Mason syndrome
223:Fingerprint analysis
2774:Forensic techniques
2627:Hueske, Edward E.,
2304:2016PhRvF...1d3201C
2133:2015NatSR...511461L
1696:, December 17, 2008
1433:Eduard Piotrowski,
723:non-Newtonian fluid
458:forensic entomology
395:Polymer engineering
353:Related disciplines
268:Forensic geophysics
248:Gloveprint analysis
228:Firearm examination
198:Body identification
2601:Taylor and Francis
2578:Additional sources
2121:Scientific Reports
1905:www.britannica.com
1707:"Blood components"
1693:Grand Forks Herald
1686:Archie Ingersoll.
1642:. August 19, 2010.
1640:The Texas Observer
1002:In popular culture
897:blunt force trauma
892:
879:
860:
787:
779:
700:interactions are:
370:Fire investigation
253:Palmprint analysis
213:Election forensics
96:Forensic genealogy
25:
2495:978-0-309-13135-3
2454:978-0-19-959400-9
2357:978-0-429-24804-7
2212:978-0-12-370482-5
2141:10.1038/srep11461
1978:978-1-4200-3946-7
1946:978-0-470-01826-2
1617:10.7396/IE_2012_E
1533:The Big Streetcar
1498:10.7396/IE_2012_E
1468:10.7396/IE_2012_E
1179:10.7396/IE_2012_E
1140:978-1-4200-3946-7
1106:10.7396/IE_2012_E
1042:Catherine Willows
917:confirmation bias
613:, a professor of
573:police procedural
514:
513:
292:Digital forensics
233:Footwear evidence
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2020:(1–3): 131–136.
2005:
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841:
769:Bloodstain types
506:
499:
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418:Related articles
325:Network analysis
315:Malware analysis
273:Forensic geology
50:
40:Forensic science
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2006:
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1951:
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1925:"Swipe Pattern"
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745:Surface tension
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672:Daniel Attinger
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2433:"void pattern"
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2336:"Introduction"
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