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California Department of Corrections

California Department of Corrections. Crime Scene and Evidence Preservation. DO NOT CROSS. CRIME SCENE. 1. 5/17/00. What is “evidence?”. “…testimony, writings, material objects, or other things presented to the senses that are offered to prove the existence or nonexistence of a fact.” .

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California Department of Corrections

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  1. California Department of Corrections Crime Scene and Evidence Preservation DO NOT CROSS CRIME SCENE 1 5/17/00

  2. What is “evidence?” “…testimony, writings, material objects, or other things presented to the senses that are offered to prove the existence or nonexistence of a fact.” Evidence Code 2 5/17/00

  3. Direct Directly proves a fact, without an inference or presumption and which in itself, if true, conclusively establishes that fact. • Circumstantial Pertinent items surround the circumstances of the crime. Types of Evidence 3 5/17/00

  4. Hearsay A statement that was made other than by a witness while testifying at the hearing and that is offered to prove the truth of the matter stated. Types of Evidence 4 5/17/00

  5. Latent Cannot be seen by naked eye. • Trace Minute quantities difficult to find. • Fragile May deteriorate or be destroyed if not handled properly. Categories of Evidence 6 5/17/00

  6. Instrumentality of the Crime Objects used in commission of the crime. • Fruits of the Crime Items obtained by perpetrator during commission of the crime. Terms for Evidence 7 5/17/00

  7. Elements of a Crime Conditions that must exist and be proven to exist for an act to be called a specific kind of crime. Terms for Evidence 8 5/17/00

  8. What material objects could be evidence? Shoe Prints Fingerprints Bite marks Fibers Injuries Documents Body fluids Clothing Sheets Hairs Blood Weapons/weapon stock Drugs/drug paraphernalia 9 5/17/00

  9. Functions of Evidence • Assists in proving that a crime happened or did not. • Assists in proving one or more elements of a crime (motive, opportunity and means). • Assists in proving guilt or innocence of the defendant. 11 5/17/00

  10. Functions of Evidence • May disprove the testimony of a witness. • May discredit the testimony of a witness. • May support the testimony of a witness. 12 5/17/00

  11. Urine Collection • Random Selection • Suspect • Mandatory Random Drug Testing • Family Visiting/Temporary Community Leave 20 5/17/00

  12. Observation Watch When it is known or observed that inmates have weapons, narcotics, keys or any other serious contraband that has been ingested or secreted in the vaginal or anal cavities. 21 5/17/00

  13. Chain of Custody Maintaining accountability for evidence from the time it comes into the possession of a peace officer until the time it is offered in court. 23 5/17/00

  14. Chain of Custody Maintaining accountability for evidence from the time it comes into the possession of a peace officer until the time it is offered in court. 24 5/17/00

  15. Chain of Custody Maintaining accountability for evidence from the time it comes into the possession of a peace officer until the time it is offered in court. 25 5/17/00

  16. Chain of Custody Maintaining accountability for evidence from the time it comes into the possession of a peace officer until the time it is offered in court. 26 5/17/00

  17. Chain of Custody Maintaining accountability for evidence from the time it comes into the possession of a peace officer until the time it is offered in court. 27 5/17/00

  18. Chain of Custody Maintaining accountability for evidence from the time it comes into the possession of a peace officer until the time it is offered in court. 28 5/17/00

  19. Crime Scene Any area in which a crime has been committed or an area in which evidence has been found. Victims  Physical evidence Visual cues, sounds and/or smells 30 5/17/00

  20. DO NOT CROSS CRIME SCENE Crime Scene Preservation To protect the crime scene and preserve its evidence. Ensure that no part of a crime scene is contaminated, disturbed or manipulated in any way. 32 5/17/00

  21. DO NOT CROSS CRIME SCENE 1. Start a written log - Document your arrival time 2. Establish perimeter & seal area - Tape area or close doors - Start with large area then narrow down 33 5/17/00

  22. Crime scene photograph 34 5/17/00

  23. DO NOT CROSS CRIME SCENE 3. Secure names at the scene - Do not take statements 4. Document names & times of staff entering scene - No unnecessary individuals entering - Control the flow with single entry point 35 5/17/00

  24. DO NOT CROSS CRIME SCENE 5. Record crime scene - Do not enter scene to record - Sketch an image - Identify area specifically 36 5/17/00

  25. Clockwise or Spiral 38 5/17/00

  26. Zone 1 2 3 A B 4 5 6 C D 1 2 3 4 39 5/17/00

  27. DO NOT CROSS CRIME SCENE If you are required to enter crime scene  Document when you entered.  Be cautious of altering evidence.  Never add or delete elements.  Always use universal precautions. 40 5/17/00

  28. Crime scene photograph 41 5/17/00

  29. Crime scene photograph 42 5/17/00

  30. Crime scene photograph 43 5/17/00

  31. 43.5” 62” Toilet Triangulation Method Desk Beds Shelf 44 5/17/00 Door

  32. Processing is to dust item for prints, look at under a microscope or other process of investigation. – Department of Justice – Investigative Services Unit Evidence Preservation Preservation is ensuring that no part of that item of evidence is contaminated, disturbed or manipulated in any way. – You 46 5/17/00

  33. Evidence Preservation 1. Use precautions 2. Carefully pick up - Don’t contaminate - Pick up at corners or edges 3. Permanently mark or scribe 47 5/17/00

  34. Evidence Preservation 4. Fill out evidence tag 5. Fill out evidence bag - Information on bag must match information on tag. 6. Place item inside evidence bag 7. Place bag in evidence locker 48 5/17/00

  35. Evidence photograph 49 5/17/00

  36. Quiz You will have 10 minutes to complete this quiz. 50 5/17/00

  37. Quiz Review From the following list select the appropriate category of evidence for the definition. A 1. ___ Cannot be seen with the naked eye. C 2. ___ May deteriorate or be destroyed if not handled properly. D 3. ___ Minute quantities difficult to find. A. Latent Evidence B. Fragile Evidence C. Fragile Evidence 51 D. Trace Evidence 5/17/00

  38. Quiz Review 4. Crime s 4. Crime scene evidence serves some very critical functions. According to the lesson plan, which of the following statements is not one of the functions of evidence? A. Assists in proving that a crime happened or did not happen. B. Solid evidence makes further investigation unnecessary. C. Assists in proving one or more elements of a crime (motive, opportunity and means). D. Assists in proving guilt or innocence of the defendant. E. May disprove, discredit or support the testimony of a witness. 52 5/17/00

  39. Quiz Review 4. Crime s 4. Crime scene evidence serves some very critical functions. According to the lesson plan, which of the following statements is not one of the functions of evidence? A. Assists in proving that a crime happened or did not happen. B. Solid evidence makes further investigation unnecessary. C. Assists in proving one or more elements of a crime (motive, opportunity and means). D. Assists in proving guilt or innocence of the defendant. E. May disprove, discredit or support the testimony of a witness. 53 5/17/00

  40. Quiz Review 5. Which of the following best defines “chain of custody?” A. At a crime scene, witnesses are “chained” together at the waist until incident statements can be taken from each person. B. Maintaining accountability for evidence from the time it comes into the possession of a peace officer until the time it is offered as evidence in court. C. Refers to the chain links used to padlock evidence for safe keeping until presented in court. D. A slang term for physical restraint gear used to take a suspect into “custody.” E. The term used when inmates are transported to testify in court. 54 5/17/00

  41. Quiz Review 5. Which of the following best defines “chain of custody?” A. At a crime scene, witnesses are “chained” together at the waist until incident statements can be taken from each person. B.Maintaining accountability for evidence from the time it comes into the possession of a peace officer until the time it is offered as evidence in court. C. Refers to the chain links used to padlock evidence for safe keeping until presented in court. D. A slang term for physical restraint gear used to take a suspect into “custody.” E. The term used when inmates are transported to testify in court. 55 5/17/00

  42. Quiz Review From the following list match the two types of crime scene search techniques with their definition. C 6. ___ Clockwise or spiral A 7. ___ Grid A. Scene divided into areas and each searcher is assigned an area. B. Searching in a straight line, walking with your first foot forward and the following foot touching toe to heal. C. Searching from the outermost edge working inward. 56 5/17/00

  43. California Department of Corrections Crime Scene and Evidence Preservation DO NOT CROSS CRIME SCENE 57 5/17/00

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