1 / 16

FORENSIC SCIENCE

FORENSIC SCIENCE. Crime Scene Analysis. CRITICAL THINKING.

orlando-estes
Download Presentation

FORENSIC SCIENCE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FORENSIC SCIENCE Crime Scene Analysis

  2. CRITICALTHINKING When Mrs. Jackson came back from lunch, there were several messages on her desk. By changing each digit of the phone numbers to one of the three corresponding letters on the telephone buttons, can you determine from whom each message came?

  3. Answers to Critical Thinking • 336-8478 dentist • (222)686-8268 accountant • 774-6837 printer • 487-2263 husband • 247-5463 airline • 832-2437 teacher

  4. FACETS OF GUILT • Means--the ability of have committed the crime • Motive--the reason for committing the crime. (This doesn’t have to be proven or presented in a court of law, but its what everyone wants to know.) • Opportunity--time or availability to have committed the crime.

  5. Murder Charges • 1st Degree Murder--premeditated • 2nd Degree Murder--killed intentionally, but not thought out as much ahead of time • Voluntary Manslaughter--usually involves sudden passion (fear, rage, anger, terror) • Involuntary Manslaughter (criminally negligent homicide)--killed someone, but unintentionally

  6. Crime Scene Team Is a group of professional investigators, each trained in a variety of special disciplines. Team Members • First Police Officer on the scene • Field Evidence Technician • Medical Examiner (if necessary)

  7. First Officer at the Scene • A Assess the crime scene • D Detain the witness • A Arrest the perpetrator • P Protect the crime scene • T Take notes

  8. Evidence Technician • Record the crime scene • Photography • Sketches • Notes • Conduct a search for evidence • Set up numbers at the pieces of evidence • Has the necessary equipment • Forceps • Bags--paper and plastic • Envelopes • Jars and Q-tips • Properly collect all evidence • Maintain a chain of custody • Obtain reference samples (evidence whose origin is known) • Submit evidence to Lab

  9. Medical Examiner’s Responsibilities • Identify the deceased • Establish the time and date of death • Determine a medical cause of death--the injury or disease that resulted in the person dying • Determine the mechanism of death--the physiological reason that the person died • Classify the manner of death • Natural • Accidental • Suicide • Homicide • Undetermined • Notify the next of kin

  10. Physical Evidence • All objects that can establish that a crime has been committed • Can potentially link a crime to a victim and/or a crime to a perpetrator • Can be anything from massive objects to microscopic traces

  11. Evidence Characteristics ABO Blood Typing Blood DNA Typing Class Evidence--common to a group of objects or persons Individual Evidence--can be identified with a particular person or source.

  12. 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

  13. Spiral Grid Crime Scene Search Patterns TWO of FOUR PATTERNS

  14. Strip or Line Quadrant or Zone Crime Scene Search Patterns TWO of FOUR PATTERNS

  15. TRIANGULATION Measure from A to B and then to the evidence in a triangular shape.

  16. Remember: “HOW PLUS WHY EQUALS WHO” --John Douglas, former FBI profiler Keep this in mind as you analyze a crime scene…

More Related