Detailed Study Notes on Crime Scene Investigation and Evidence Collection

Chapter 1: Introduction to Crime Scene Investigation

  • Crime scene photography is crucial for usable evidence.

    • Aim for usable photographs rather than artistic images.

    • Use digital cameras to avoid wasting film; erasing is an option.

  • Importance of photographic conditions:

    • Positioning of evidence items aids in scene reconstruction.

    • Require photos from multiple angles:

    • Close-up shots of evidence.

    • Midrange shots to show context within the scene.

  • Documentation methods:

    • Combine photographs with detailed notes and sketches.

    • Essential for accurate recreation of the crime scene.

    • Purpose of documentation is to present evidence effectively to a jury or judge.

  • Personal experiences hearken the importance of perspective:

    • Every individual views situations based on personal experiences.

    • Example of differences in dental practices and equipment observed in various environments.

  • Types of sketches discussed:

    • Layout Sketch:

    • Shows relationships of the crime scene's areas effectively.

    • Detailed Sketch:

    • Focuses on specific areas within the crime scene.

    • Large Scale Sketch:

    • Offers detailed representations of specific evidence locations in the scene.

  • Real-life implications of improper photography:

    • Example of a distant, non-useful photograph taken improperly.

    • Understand the importance of capturing detailed and clear evidence immediately.

  • Concerns on future access to sites:

    • Once the crime scene is released, returning for proper documentation may be impossible.

    • Always gather evidence correctly upon first arriving at the scene to avoid misrepresentation.

  • Importance of thorough searches:

    • Different methods required based on size of the area searched, e.g., small rooms versus large outdoor areas.

    • Importance of systematic searching methods (e.g., not just one pass).

Chapter 2: Police Search Methods

  • Different search methods discussed:

    • Strip Search:

    • Divide the area into strips for systematic searching.

    • Depends on personnel availability and nature of what is being searched for.

    • Grid Search (Double Strip Search):

    • Involves two teams to cover both horizontal and vertical areas.

    • Zone Method:

    • Divide the area into smaller zones, assigning teams to each zone.

    • Spiral Search:

    • Aimed at larger areas for swift searches, initiated from a central point.

  • Citing legal cases related to search methodology (Brewer v. Williams and Nix v. Williams):

    • Context of the cases illustrating that methods must support legal standards.

    • Discussion of Inevitable Discovery Doctrine: body would have been found regardless.

    • Importance of documentation and efficient evidence recovery in legal disputes.

Chapter 3: How to Find Small Pieces of Evidence

  • Search Planning:

    • Use of markers to establish search parameters in large areas.

  • Vigilant searching for different types of evidence:

    • Distinction based on physical size and location of the evidence.

  • Each discovery of evidence must be thoroughly documented:

    • Photograph items before collection, taking precise measurements from immovable objects.

    • Methods of marking location for references include multiple angle measurements.

  • Team collaboration during evidence collection:

    • Recommended that each item is marked and verified by two individuals to ensure credible documentation in court.

    • Prevents issues related to hearsay evidence.

  • Note on firearms and evidence collection:

    • Methods of handling weaponry to preserve prints:

    • Procedures for revolvers vs. semi-automatics outlined for evidence preservation.

Chapter 4: Whole Crime Scene Management

  • Importance of crime scene preservation and debriefing after completion of search:

    • Ensuring each area is documented and re-examined to confirm no evidence is missed.

  • Reminder of the potential requirement for searches at night:

    • Suggestion to revisit scenes in daylight for thoroughness.

  • Follow post-scene initiations and actions based on findings:

    • Analysis of forensic testing necessary based on findings during the search phase.

    • Completing a final survey concluding the search process.

Chapter 5: Crime Scene Photography

  • Interdependence of various documentation methods:

    • Combination of sketches, notes, and photographs enhances overall evidence clarity.

  • Crime scene photography differs significantly from standard photography:

    • Focus on clarity and accurate representation over artistic elements.

    • Use of essential digital technology for documentation, considering aspects like light and distortion.

  • Guidelines for photographic documentation:

    • Capture multiple perspectives and details during initial visits.

Chapter 6: Digital Single Lens Reflex Cameras

  • Shift from film to digital photography:

    • Benefits of digital image quality and capability for immediate review.

  • Explanation of Single Lens Reflex (SLR) technology:

    • Mechanisms allow for accurate depiction of subject through viewfinder.

  • Strict guidelines against altering evidence photos:

    • Emphasis on fair and undistorted representations in forensic documentation.

  • Video documentation noted:

    • Should avoid audio recording to comply with privacy laws and ethical considerations.

Chapter 7: Conclusion

  • Summary of best practices in evidence documentation and handling during investigations.

  • Vital importance of understanding the legal implications of search methodologies and photography in crime scenes.

  • Highlighting thorough preparation and adherence to protocols as critical components for successful forensic investigation.