1. Preservation and Collection of a Crime Scene By Mike Wiehe

2.  The student will › Explain steps for crime scene preparation › Identify the purpose and operational structure of a crime scene unit › Describe the basic six team positions of a crime scene unit Crime Scene Admin and Management 2

3.  The student will › Identify the 12 stages involved in evaluating a crime scene › List basic equipment required to process a crime scene › Describe basic safety considerations › Describe methods of controlling crime scene contamination Crime Scene Admin and Management 3

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7. 7 Evidence teams need to be equipped with necessary vehicles and other resources to assist with crime scene searches

8.  Accumulate › packaging/collection of materials necessary for typical crime scenes › Personal Protection Equipment (PPE)  Monitor crime scene vehicle to be sure that it is properly packed out at all times  Liaison with specialists Crime Scene Admin and Management 8

9.  Clothing  Communication  Lighting assistance  Shelter  PPE  Food and liquids  Medical assistance  Scene security  Equipment  Specialty Tools Crime Scene Admin and Management 9

10.  Team Leader  Photographer  Sketch Preparer  Evidence Recorder/Custodian  Evidence Recovery Personnel  Specialists Crime Scene Admin and Management 10

11.  In charge of crime scene  Ensure safety of personnel  Prepare administrative log  Prepare narrative description  Conduct preliminary survey 11 Crime Scene Admin and Management

12.  Monitor search process  Make team assignments  Responsible for scene security  Conduct final survey  Release scene Crime Scene Admin and Management 12

13. Crime Scene Admin and Management 13 Who? What? When? Where? Why? How?

14.  Take entry and exit photographs  Photograph entire scene: general, overall, medium and close-up (with/without a scale)  Photograph important evidence, latent fingerprints, impressions  Prepare photography log for a record 14 Crime Scene Admin and Management

15. 15 Who? When? Where?

16. Crime Scene Admin and Management 16 How? What?

17.  Make the sketch/diagram  Designate and label areas  Document where items of evidence were found on the sketch  Take appropriate measurements  Place administrative information on the sketch › Case number, date, location, preparer › Indicate north › Not to scale › Key or legend Crime Scene Admin and Management 17

18. Crime Scene Admin and Management 18 Who? What? When? Where? This sketch is not to scale

19. Crime Scene Admin and Management 19

20. Crime Scene Admin and Management 20

21.  Prepare the evidence log  Receive and record all evidence  Coordinate evidence packaging, preservation  Function as the evidence custodian 21 Crime Scene Admin and Management

22. 22 Who?What?Where? Y/ND/I Paper Plastic Box Can Overpack Valuable Drug Firearm Bio- Hazard HazMat Explosive Wet

23.  Locate and collect evidence  Have significant evidence photographed before it is collected  Initial and date all evidence and turn it over to the evidence recorder/custodian Crime Scene Admin and Management 23

24. Crime Scene Admin and Management 24  Consider which specialists may be needed to assist with processing crime scene  anthropologists, entomologists, botanists, geologists, fingerprint specialists, bomb technicians, HAZMAT personnel, cadaver dogs, etc.

25.  Preparation  Approach scene  Secure and protect scene  Initiate preliminary survey  Evaluate physical evidence possibilities  Prepare narrative description Crime Scene Admin and Management 25

26.  Depict scene photographically  Prepare diagram/sketch of scene  Conduct detailed search  Record and collect physical evidence  Conduct final survey  Release scene Crime Scene Admin and Management 26

27.  Assign tasks › Team leader, photographer, sketcher, search personnel  Acquire equipment and supplies › Paperwork, packaging materials, PPE  Evaluate legal ramifications › Has a search warrant been obtained Crime Scene Admin and Management 27

28.  Consider comforts of personnel › Food, water, shifts  Determine need for specialized assistance › Bomb techs, HAZMAT, CART, cadaver dogs Crime Scene Admin and Management 28

29.  Careful approach › Avoid destroying evidence › Be aware of transient evidence, foot and tire impressions, hairs and fibers  Make pertinent notes concerning observations Crime Scene Admin and Management 29

30.  Consider personal safety › PPE  Establish Perimeter › Outdoor: larger perimeter › Indoor: more self contained Crime Scene Admin and Management 30

31. Crime Scene Admin and Management 31

32. Crime Scene Admin and Management 32

33.  Determine extent of scene protection  Check for adequate scene security  Obtain information regarding the original condition of the crime scene  Take extensive notes; do not rely on memory Crime Scene Admin and Management 33

34.  Keep out unauthorized personnel  Record who enters and leaves scene  Protect outdoor locations from weather 34 Crime Scene Admin and Management

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