Module 16 Blood Stain Patterns Blood Volume 8% of body weight 4 – 5 liters female 5 – 6 liters male 40 % blood loss usually causes death 1.5 liter blood loss can incapacitate Blood Stain Evidence Biblical murderer Cain Abels blood on the ground cried out Cains guilt Abel is the first documented murder Cain is the first documented murderer victim The bloodstain patterns left by falling‚ projected or smeared blood can be analysed by trained crime scene investigators. Careful observation
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less than two millimeters in diameter. The force necessary to produce high velocity spatter is greater than one hundred feet per second. This type of spatter is usually associated with gunshots‚ explosions‚ and high speed collisions and looks very
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Conditions That Can Affect Blood Results Using Luminol The purpose of this science experiment was to discover under what conditions can blood give a false result using the presumptive test called luminol. In order to better grasp the experiment‚ research was conducted on several subtopics: the basic concept of luminol‚ the basic concept of artificial blood which is being used for this experiment instead of legitimate blood‚ and substances interferences that could tamper with crime scene results
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Introduction: When investigating a crime scene‚ many different variables are taken into account such as fingerprints‚ any other forms of DNA‚ or even clues left behind at a crime scene. Even looking at blood splatter‚ the forensic technician can conclude an estimated guess to the weapon used‚ the height of the person‚ whether it was foul play or not‚ and even if it was passive patterns or projected patterns. Blood splatter analysis becomes important when recreating a crime scene (Peschel). Bloodstain
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History Of Bloodstain Patterns Function of bloodstain pattern analysis Bloodstain pattern interpretation/analysis has been around for many years but has only really been recognized in the past several decades. This interpretation/analysis is like a very important tool that an investigator or forensic scientist may use to help them better understand what happened or what did not happen in a case where there was bloodshed. Discoverable through the examination of bloodstain pattern
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Blood Stain Analysis On April 18‚ 2013 at 6:30pm‚ in ballroom 250 at the Student Union Building; I went to one amazing‚ interesting speech on Blood Stain Analysis. Paulette Sutton is from Memphis‚ Tn. She is one of the best forensic investigators‚ which is first called to observe a blood scene. As for her job is to go to a murder scene and investigate how a murder‚ homicide‚ or even a fight occurred according to how the blood splattered‚ or dripped. For someone who just investigated blood and
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Allelopathic potential of crop residues for weed management in wheat under semi-arid conditions of Pakistan Muhammad Ashraf Professor of Agronomy‚ PMAS-Arid Agriculture University‚ Rawalpindi‚ Pakistan. drashraf_150@yahoo.com RATIONALE • Rainfed Wheat- Main winter crop grown by about 80% of the farmers on residual soil moisture‚ received during monsoon1. • Weeds infestation- a major yield reducing factor (25-30%↓); • If weeds are controlled‚ crop yield can be enhanced by about 37%2.
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The term distance determination corresponds with Forensic Gunshot Residue Distance Determination Testing. Distance determination is the process of determining the distance a firearm was shot from its intended target. The determination process requires the firearm to be test fired from various distances to compare gunshot residue (GSR) patterns made during the test and compared to the ones made on the target. Often times the request for distance determination occurs resulting in the death from a shooting
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FIS 30500 Scientific Working Groups The purpose of the Scientific Working Groups is to improve practices and build standards. So far there are 24 Scientific Working Groups in various disciplines as of January 2012. There are five interesting ones that will be discussed. Each of the 24 working groups has scientists working within that specific field. Those scientists are often Federal‚ state‚ or local government forensic laboratory scientists‚ but not all. They are experts in their fields. Facial
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investigators and packaged and preserved by them as well. A few of the physical evidence that will be reviewed are; trace evidence‚ fingerprints‚ and footwear impression and tool marks. The physical evidence known as trace evidence can be gunshot residue‚ paint residue‚ chemicals glass‚ and illicit drugs. When an investigator is gathering this evidence they may use tweezers‚ plastic containers that have lids‚ a knife‚ and a filtered vacuum device. With certain physical evidence they will need to use
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