PPT-Blood & Blood Spatter Analysis

aka Forensic Serology Sources wwwcrosscuttingconceptscom Forensic Chemistry by David E Newton Infobase Publishing 2007 Take out your notebook and copy the following questions Provide a short answer . WARNING. Contains graphic images. Angle of Impact. The acute angle formed between the direction of a blood drop and the plane of the surface it strikes. . Arterial spurting (or gushing) pattern. . Bloodstain pattern(s) resulting from blood exiting the body under pressure from a breached . Blood spatter . 1939—spatter . patterns first . analyzed. Blood may . spatter . when a wound is inflicted. Blood . spatter . pattern—a grouping of blood stains. Patterns help to reconstruct the events surrounding a shooting, stabbing, or beating. Spatter Definition. What is impact spatter?. A blood stain produced when an object makes forceful contact with a source of blood, projecting blood outward from the source.. Why do we care?. Why is impact spatter important?. Bloodstain Science . What . does the abbreviation BPA represent? . Bloodstain Pattern Analysis. What can an investigator learn from the analysis of a blood spatter?.  Type and velocity of weapon. Ricky Pedersen. De La Salle College. Newton’s Law of Cooling. Newton’s Law of Cooling. You may wish to choose a volunteer to “play dead”. Police tape is a bonus!. Fake blood. Newton’s Law of Cooling. www.loctite.com.au Why Nozzle Anti-Spatter Sprays Could Be Doing More Harm Than GoodWeld Affairs Griffin. Bloodstain patterns. The patterns left by falling, projected, or smeared blood can help the forensic investigator interpret and reconstruct what has happened at a crime scene.. Observation of the position and shape of stain patterns can give information such as:. Spatter Definition. What is impact spatter?. A blood stain produced when an object makes forceful contact with a source of blood, projecting blood outward from the source.. Why do we care?. Why is impact spatter important?. Ms. Schultz. The Sam Sheppard Case. On July 4, 1954 Sam Sheppard called police to report that his wife Marilynn was dead in the bedroom. He said the night before, his wife had gone upstairs to bed while he was asleep on the couch. When he went upstairs, he saw his wife covered in blood. He heard a noise and ran downstairs chasing after a 6’3’’ bushy haired man. The two struggled and Dr. Sheppard was choked unconscious. When police arrived, Marilynn was found with 35 wounds to the head and blood drenched the walls, door, and bed. Her face was almost unrecognizable. Sheppard served 10 years in prison before the US Supreme court rules that the trial had been tainted. The evidence was reexamined. Blood spatters and blood drops provided some of the most compelling evidence. Dr. Paul Kirk, an expert in blood analysis, determined the killer could not have been Sam because the attack was perpetrated by a left handed person. Dr. Sheppard was right handed.. Bloodstain Science. Warning: Some material in this presentation and related videos may be too graphic for some people. . What . does the abbreviation BPA represent? . Bloodstain Pattern Analysis. What can an investigator learn from the analysis of a blood spatter?. Bits and pieces…. Use of force to describe the blood spatter. In the past, forensic investigators used ‘velocity’ to describe a pattern of blood dispersion. . Low . velocity (gravity/drop, 5ft/s) . SFS1. Students will recognize and classify various types of evidence in relation to the definition and scope of Forensic Science.. SFS2. Students will use various scientific techniques to analyze physical and trace evidence.. Plasma. fluid portion of normal . unclotted. blood . red blood cells, white blood cells, and platelets are suspended in it. BLOOD COMPONENTS. Serum. liquid portion of clotted blood. SURFACE TENSION OF BLOOD. SFS3 Students . will analyze the use of toxicology, . serology. , and DNA . technology in . forensic investigations. . d. . Differentiate the forensic techniques used to distinguish human and . animal .