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Presentation transcript:

Warm Up: Sign up for Remind 101 Enter this Number:81010 Text this

The jigsaw strategy enables students to cover large portions of a text in a short period of time and underscores the importance of collaborative efforts. Using the jigsaw technique, individual students become experts on one portion of a text and then share their experiences with others in a small group.

You will be assigned a number to correspond to the following vocabulary words 1. Rough Sketch 2. Final Sketch 3. Crime Scene Perspectives 4. Baseline mapping/Rectangular coordinate mapping 5. Triangulation 6. Polar Grid Coordinates On pg 25, Take notes using the “Documenting the Crime Scene” Article

Now you will join an “expert” group with students who share the same word to create a presentation to teach the class your word.

Go back to your original group and present your word. You will be quizzed over this information.

1. Take notes at the crime scene. 2. Videotape the crime scene. 3. Photograph the crime scene. 4. Sketch the crime scene.

 The assignment of units of measurement or correct perspective to the overall scene and the relevant physical evidence identified within the scene.  Three techniques to obtain measurements: triangulation, baseline, polar coordinates

 Triangulation: method of measurement of a crime scene and physical evidence; every item of evidence is measured from two fixed points.  Baseline: method for measuring a crime scene and the evidence present; after a fixed line is identified, the items of evidence are measure from that line at right angles.  Polar coordinates: method of crime scene measurement; measurement of items of evidence based upon their distances and angles from a fixed position.

Once the crime scene has been photographed and before the evidence is disturbed, the investigator prepares the rough sketch. The rough sketch should include: ► All the details necessary to complete a finished drawing ► Mark “N” for North to orient the drawing ► Dimensions of the room or the taped off area of the crime scene ► Every large object in the area and its relation to the outer boundaries ► Every small object in the area and its relation to the focal point ► Measurements that are verified by someone else. ► A legend to explain any symbols that are used to identify various objects Remember: Crime scene sketches may be introduced as evidence in court. It is important that it is accurate and no additions or changes should be made once the investigator leaves the scene

Final drawings are based on the information provided by a rough sketch of a crime scene.  Use the crime scene area dimensions to draw boundaries  Determine the POE (point of entry) and draw it to scale  Choose ONE sketch technique to record the exact position of the furniture, the body and any other large objects  Record the location of the physical evidence  Assign each piece with a letter or number that is keyed to the legend Remember: Never add or delete anything on the sketch once leaving the scene and place only important items on the sketch. And don’t trust your memory because it will it fail with time.