challenging because the hair doesn’t always link directly to a person. But it can give a better idea of the person you’re looking for by determining the race‚ hair color‚ etc. 3. Why do you think forensic scientists study bloodstain patterns? What can be learned from them? Blood patterns can be used to determine what direction the blood was traveling and the spot where it came from. 4. Out of the types of evidence
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an impact spatter pattern is the area the individual stains emanated from on a two-dimensional plane. The area of origin of a bloodstain pattern in three-dimensional space may represent the position of the victim or suspect when the stain-producing event took place. These areas can determine and reveal to an investigator the direction of force‚ angle of impact‚ and areas of origin. An area of origin determination should be calculated whenever possible. And also transfer patterns‚ created when an object
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Review Questions 1. What are the three types of fingerprints found in the human population? How often does each occur? 1. Loop Fingerprints‚ 60-60% 2. Whorl Fingerprints‚ 30-35% 3. Arch Fingerprints‚ 5% 2. What is a medulla? What do forensic scientists use this for? The medulla is the set of cells that run through hair. Forensic scientists use the medulla to look at the shape and color of pigment and also to see if the hair has been bleached or dyed. 3. What is a precipitin test? What is it
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Lizzie Reynolds 9/22/13 04.05 1. What are the three types of fingerprints found in the human population? How often does each occur? Three types of fingerprints found in the human population include loop fingerprints‚ which about 60-65% of the population have‚ whorl fingerprints‚ which about 30-35% of the population has‚ and arch fingerprints‚ which only about 5% of the population has. 2. What is a medulla? What do forensic scientists use this for? Medulla is a set of cells that run through
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Review Questions 1. What are the three types of fingerprints found in the human population? How often does each occur? Loop‚ Whorl and Arch. Loop occurs in 60-65 percent of the population‚ Whorl occurs in 30-35 percent‚ and Arch only about 5 percent. 2. What is a medulla? What do forensic scientists use this for? A set of cells that runs through a hair. Forensic Scientists use this to distinguish animal hair from human hair. 3. What is a precipitin test? What is it used for? A precipitin test
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surface of any kind. You may think this is a new technique but blood spatter analysis has been around since 1895 when Edward Piotrowski from the University of Krakow wrote a document on the direction of blood spatter. It has been around for years and helps criminal investigators on brutal crime cases. Now the general blood spatter ways are the Single Drop‚ Transfer Bloodstains‚ Impact Spatter‚ Cast off Stain‚ Projected Pattern/Arterial Damage Stain‚ Pool Stains‚ Insect Stains‚ and Expiration Stains.
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eldest son Washington. At first‚ none of the members of the Otis family believes in ghosts‚ but shortly after they move in‚ none of them can deny the presence of Sir Simon (The Ghost). The family hears clanking chains‚ they witness re-appearing bloodstains "on the floor just by the fireplace"‚ which is removed every time it appears in various forms(colors). But‚ humorously‚ none of these scare the Otises in the least. In fact‚ upon hearing the clanking noises in the hallway‚ Mr. Otis promptly gets
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who wishes to use or view the evidence. This is necessary to reduce the loss of evidence and cross contamination by individuals who should not have contact with it. The area is photographed in meticulous detail and any signs of injury such as bloodstains are marked‚ numbered and photographed. These photographs are often important in the piecing together of an event so that officers who were not able to attend the scene can get an understanding for how it looked. Nowadays with the advent of technology
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handbook is to educate our customer in the Criminal Justice System regarding the services provided by the Oregon State Police Forensic Services Division‚ and the recommended methods of documenting‚ collecting and preserving physical to ensure the best analysis results. The value of properly collected physical evidence followed by examination and interpretation by the forensic laboratory cannot be over-emphasized. Every attempt has been made to make this handbook as current and up-to-date as possible;
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are the ones I have. What do you think would be the most challenging aspect of collecting and analyzing hair samples? Why? Answer: looking for medulla because usually not all hair might have it. Why do you think forensic scientists study bloodstain patterns? What can be learned from them? Answer: They need to make sure it is blood or another substance. They can learn who it belonged to especially if it is dried. Out of the types of evidence discussed in this unit‚ which one do you think is the
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