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FORENSIC SCIENCE Serology Day One

FORENSIC SCIENCE Serology Day One. Forensic File #1. What is the first question an investigator needs to ask when they think they have found blood at a crime scene?. Forensic File #1. Is it really blood? Is it human blood? Who’s blood is it?. Today’s assignments.

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FORENSIC SCIENCE Serology Day One

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  1. FORENSIC SCIENCESerologyDay One

  2. Forensic File #1 • What is the first question an investigator needs to ask when they think they have found blood at a crime scene?

  3. Forensic File #1 • Is it really blood? • Is it human blood? • Who’s blood is it?

  4. Today’s assignments • Reading assignment on front table • Presumptive blood lab- table 4 • Animal blood lab- look at slides on table 3

  5. Blood Questions to be answered: • Is it blood? • Is it human blood? • Whose is it? • Determine blood type, alcohol content, drugs present • Determine the method(s) in which blood may have been deposited

  6. You should have back in your folder: • Toxicology binder check (18 pts) • Toxicology test

  7. Serology Unit • Day Two- Blood components and typing

  8. Forensic File #2 • A murderer thinks that they can wash away all signs of blood by using everyday household cleaners and then painting over the spots with new paint. • Will this work? Explain your answer.

  9. Let’s review…

  10. Presumptive Tests for Blood • Kastle-Meyer color test--phenolophthalein and H2O2are mixed together; the blood’s hemoglobin will cause the formation of a deep pink color • Luminoltest--reaction with blood; results in the production of light

  11. Human vs Animal • Microscopic survey • Characteristic Differences

  12. Animal Blood Frog Blood • Larger nucleic red blood cells

  13. Human Blood • Numerous non-nucleic red blood cells--5 to 6 million per mm3 • Larger but less numerous white blood cells • Tiny, cellular fragments called platelets • WBC- leukocytes • RBC- erythrocytes • Platelets- thrombocytes

  14. DUE TODAY • Presumptive Blood detection reading • Detection of Blood lab • Animal/Human blood microscopic comparison • Today’s assignments: • Blood type probability problems • Blood Basics webquest

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