4 Steps of Preserving a Crime Scene Arrival

4 Steps of Preserving a Crime Scene

Arrival at the crime scene – Step 1 Who's responsible? Responding officer For what? Time Dispatched Responded Arrived Left Date Month/day/year Notes Weather Lighting Odor Victim/Suspect Securing the Scene Set up crime scene tape

Documentation – Step 2 4 Types of methods Written Notes Photography Sketching Videography

Searching the Crime Scene – Step 3 Depends on _____ and size _____ of crime type and _number of individuals 
participating Who's chooses? Lead Detective

Searching the Crime Scene – Step 3 Types of Search Methods Spiral Grid Quadrant Circular pattern towards a fixed point in center of room Horizontal and Vertical Segments for individual searching - more than 1 person involved Strip or Line One direction

Searching the Crime Scene – Step 3 Always wear gloves and protective clothing and always collect a 
known sample (_exemplar_)

Chain of Custody Form – Step 4 Requires. . . Proper Packaging Proper Labeling Examples include: Blood or semen - air dry and place in paper bag. 
Charred debris - new paint can or tightly sealed jar

Chain of Custody Form – Step 4 Begins at the initial collection of evidence Accountability Authenticity and Integrity 1 form per piece of evidence http: //www. youtube. com/watch? v=y. FXz. G 6 qfx. Wc