Do Now: How can the locard exchange principle be used when solving a case? 2. Looking at this

1. Objective: SWBAT explain how to approach the initial investigation Complete the following on a sheet of paper. Write the objective and answer the questions in complete sentences. You DO NOT have to write the questions.THIS IS SILENT AND INDEPENDENT WORK. Do Now: How can the locard exchange principle be used when solving a case? 2. Looking at this picture, what material could be found on the evidence? (locard exchange principle)

2. TARDY • H:\Forensics1\TARDY SIGN 1.docx

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5. Complete the following on a sheet of paper. Write the objective and answer the questions in complete sentences. You DO NOT have to write the questions.THIS IS SILENT AND INDEPENDENT WORK. Do Now: How can the locard exchange principle be used when solving a case? 2. Looking at this picture, what material could be found on the evidence? (locard exchange principle)

6. Review • Procedures • Forensic Science • Locard Exchange Principle • Example

7. Forensic Science • Forensic Science is the application of science to law.

8. Locard’s Exchange Principle • When 2 objects come in contact, they exchange some material

9. Processing a crime scene • You and a partner are to come up with steps on processing a crime scene. When the police arrive --- > when evidence is collected Ten step max If you finish early… Get three different colored sheets of paper in front of you. Find some scissors for your table Find some tape for your table

10. Processing a crime scene • FOLDABLE Activity Clear your table 6 groups 7s crime scene

11. The Seven S’s of a Crime Scene? • The Scene is simply defined as the actual site or location in which the incident took place.

12. Securing the Scene • Important that the first responding officer on the scene protect the individuals involved as a first priority. • Protecting the evidence is the second task. The entire investigation could be dependent on this. • Scene is secured by a restricting a perimeter, utilizing rope or tape. Who What When Where Why How

13. Why is it important to secure the scene?

14. Separating the Witness • Why????

15. Separating the Witness • Witnesses must not be allowed to talk with each other. • This is done so they do not compare stories and so that a new story is not created. (collusion)

16. Separating the Witness • What witnesses say weighed heavily

17. Testimonial Evidence • Testimonial Evidence • Statement made under oath • What is said in court by a competent witness • Also called direct evidence Why would testimonial evidence be called direct evidence???

18. Testimonial evidence Are they accurate?

19. Testimonial evidence • Certain information affects eye witness accounts • Mug shots • Leading/Suggestive questions • Memory errors • Time between the crime and questioning of witness can affect what they remember • Perception errors • Too dark • Encounter too brief • Presence of weapon diverted witnesses attention

22. Testimonial evidence • Certain information affects eye witness accounts • Mug shots • Leading/Suggestive questions • Memory errors • Time between the crime and questioning of witness can affect what they remember • Perception errors • Too dark • Encounter too brief • Presence of weapon diverted witnesses attention • Perception Error

23. The Innocence Project • National organization dedicated to exonerating wrongfully convicted people through DNA evidence • Eye witness misidentification is the number one cause of wrongfully convictions nationwide • As of 2008, the Innocence Project exonerated 212 wrongfully convicted people

24. 7s again

25. Review • Do nows and objectives • Forensic science • LEP • 7s in order • 1s • 2s • QUESTONS???

26. Exit Ticket Remember this is done individually and silently Complete sentences for each question Because you are writing in complete sentences you do not need to write the question What could happen if the 7s was done out of order? What may happen if the first officer on the scene forgot to secure the scene? Why is testimonial evidence unreliable?

27. Scanning the Scene • A forensic examiner needs to be able to scan the scene to determine if there is a primary crime scene or potentially a secondary crime scene. • Primary scene- place the incident occurred • Secondary scene- any other place connected to the incident • Ex. • This is done by the team leader who assumes control and assigns other duties such as who will be the : • Photographer • Log Recorder • Sketch Artist • Evidence Recorder and other personnel • Specialist- entomologist, blood splatter, etc

28. Seeing the scene • Done by the photographer • A photograph is a two-dimensional reproduction of the crime scene. • It serves as the permanent record of the crime scene. • Everyone involved in the investigation will have an opportunity to look at theses photographs (the District Attorney, the defense counsel, • homicide detectives, etc). • They are also very important to you because the photographs will serve as “memory joggers” when you have to get up on the witness stand and testify. • Good pictures are essential because most trials do not take place until a year • or more has passed. • Videos can also be taking at the crime

29. Seeing the Scene • This is done by the photographer • Requirements of each photo: • Photograph overall area from up close and medium range and far away prior to moving anything. • Close up of each piece of evidence with evidence marker (including corpse) • Include a point of reference to indicate size. ( a ruler, a pen, a car key)

30. Sketching the Scene • An accurate rough sketch drawn to scale noting position of evidence and body. • All objects should be measured from 2 immovable landmarks • Sketch should include Case #, date, time, locations, and assignments. • Also included should be dimensions of room, furniture, doors, windows, distance of objects or bodies from entrances and exits • Key Legend, should include direction and scale

31. Crime SceneSketch Date: August 14, 2001 Criminalist: Ann Wilson Time: 11:35 Location: 4358 Rockledge Dr St. Louis, Mo. • A. Couch/sofa • B. Female body • C. Knife • D. Over turned Lamp • E. Chairs • F. Table • G. Fireplace E c D G A E E E F E

32. Exit Ticket Remember this is done individually and silently 2-3 complete sentences for each question Because you are writing in complete sentences you do not need to write the question What could happen if the 7s was done out of order? What may happen if the first officer on the scene forgot to secure the scene? Why are photos and sketches an important part of crime scene?