Crime Scene Unit Standard Operating Procedures Crime Scene ... Crime Scene Unit SOP Crime Scene and

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  • Crime Scene Unit Standard Operating Procedures

    Crime Scene and Multimedia Division

  • Crime Scene Crime Scene Unit SOP

    Crime Scene and Multimedia Division

    Crime Scene Unit SOP Document ID: 21392 Issued By: Division Director Issue Date: 09/06/2019 Uncontrolled When Printed Page 2 of 77

    1. Introduction..................................................................................................................................................5 2. Response to Calls for Service ........................................................................................................................7

    2.1. Scope .................................................................................................................................................7 2.2. Safety.................................................................................................................................................7 2.3. Personal Protective Equipment (PPE)................................................................................................7 2.4. Preventing Contamination ................................................................................................................8 2.5. Procedure for Requesting CSU Services ............................................................................................8 2.6. Scene Responsibility ..........................................................................................................................9 2.7. Crime Zone Perimeter .....................................................................................................................10 2.8. Release of the Crime Scene .............................................................................................................10

    3. Equipment ..................................................................................................................................................11 3.1. HFSC Equipment Assigned to Individual CSIs...................................................................................11 3.2. Performance Checks........................................................................................................................11 3.3. Equipment .......................................................................................................................................11

    4. Evidence Handling Procedures ...................................................................................................................16 4.1. Evidence Collection and Packaging..................................................................................................16 4.2. Authorized Temporary Storage .......................................................................................................21 4.3. Outside Agency Requests ................................................................................................................21

    5. Drying Cabinets...........................................................................................................................................22 5.1. Maintenance and Use......................................................................................................................22 5.2. Other Equipment.............................................................................................................................22

    6. Documentation...........................................................................................................................................23 6.1. Scene and Examination Notes .........................................................................................................23 6.2. Chain of Custody..............................................................................................................................25 6.3. Report Writing.................................................................................................................................25 6.4. Case Records ...................................................................................................................................26 6.5. Case Record Reviews .......................................................................................................................26

    7. Crime Scene Sketches, Measurements, and Diagrams...............................................................................28 7.1. Search Patterns ...............................................................................................................................28 7.2. Sketching and Measuring ................................................................................................................28 7.3. Measuring Techniques ....................................................................................................................29 7.4. Final Diagram...................................................................................................................................30

    8. Photography and Videography ...................................................................................................................31 8.1. General Information ........................................................................................................................31 8.2. Case Identification...........................................................................................................................32 8.3. Progression and Composition of Crime Scene Photographs ...........................................................32 8.4. Long Exposure Photography............................................................................................................33 8.5. Alternate Light Source Photography ...............................................................................................33 8.6. Photography and Videography in Inclement Weather....................................................................33 8.7. Uploading Images ............................................................................................................................34 8.8. Videography ....................................................................................................................................34

    9. Biological Evidence .....................................................................................................................................35 9.1. Safety and Contamination Precautions ...........................................................................................35 9.2. Searching for Biological Fluids .........................................................................................................36 9.3. Semen, Saliva and Urine Stains .......................................................................................................36

  • Crime Scene Crime Scene Unit SOP

    Crime Scene and Multimedia Division

    Crime Scene Unit SOP Document ID: 21392 Issued By: Division Director Issue Date: 09/06/2019 Uncontrolled When Printed Page 3 of 77

    9.4. Collection of Biological Material......................................................................................................36 9.5. Known DNA Samples (Buccal Swabs) ..............................................................................................37 9.6. Contact DNA Samples......................................................................................................................38

    10. Presumptive Testing .................................................................................................................................39 10.1. Phenolphthalein ............................................................................................................................39

    11. Blood Enhancement .................................................................................................................................41 11.1. Blue Star ........................................................................................................................................41 11.2. Leuco Crystal Violet .......................................................................................................................42

    12. Trace Evidence..........................................................................................................................................44 12.1. General Trace Evidence Collection Guidelines ..............................................................................44 12.2. Trace Collection Techniques..........................................................................................................44 12.3. Hair and Fiber Reference (Known) Samples ..................................................................................45 12.4. Paint...............................................................................................................................................46 12.5. Soil and Pollen ...............................................................................................................................47 12.6. Gunpowder Residue ......................................................................................................................47 12.7. Ignitable Liquids and Ignitable Liquid Residue...............................................................................48

    13. Latent Print Processing .............................................................................................................................49 13.1. General Latent Print Information ..................................................................................................49 13.2. Categories of Latent Impressions .................................