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Published byMervin Walters Modified over 9 years ago
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Contact Traces: Blood
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Serology: The study of blood and other liquids in forensics. Taking a sample of blood off the car windscreen
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What is Blood? Makes up 9% of a person’s body weight. The average adult has about 5 to 6 litres of blood in their body.
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Blood and Crime Common evidence in violent crimes What kind of violence would lead to blood traces? http://www.staffs.ac.uk/schools/sciences/fore nsic/forensicfacilities/photography.jpg
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Blood and Crime Difficult to remove from a crime scene which makes it very incriminating evidence
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Blood and Crime Tests for blood are so sensitive that they can show up blood that isn’t visible to the eye. A trail of latent blood made visible with the use of a reagent called luminol
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Blood Groups Discovered by Karl Lansteiner in 1901. Four blood groups How is this useful in forensic science?
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Blood Groups Percentage of ABO blood group types in Australia
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Blood Groups Further categorized based on another antigen discovered by Dr Landsteiner in 1927.
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Blood Groups Blood groups are inherited from your parents Only the dominant group is expressed AO B O
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Blood Spatter: Prac this week Examination of blood splashes and smears at a crime scene tell a story (click below for video)
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Blood splatter analysis Dexter (click below for video) exterDe
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Bloodstain patterns 1.Passive Bloodstains are caused by the force of gravity
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Bloodstain patterns 2.Projected Bloodstains occur when some sort of energy or force has been transferred to the blood source.
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Bloodstain patterns 3.Transfer/Contact bloodstains occur when a bloody object comes into contact with another object.
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Blood splatter analysis http://www.youtube.com/watch?v=2UV_moa F45I
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Determining Angle of Impact
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DNA: Deoxyribonucleic Acid
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