Purpose of Sketch Portrays physical facts Specifies an exact location of evidence at scene Provides a mental picture
Rough or Final Sketch… Why?!
Measuring What units should you measure the crime scene in? __________________________ In science we use the ______________ ______________. Why do scientists use this system?
Step 1: Rectangular Coordinates Use 2 adjacent (next to each other) walls Measure at right angles (90)
Step 2: Measure length & Width of crime scene
Step 3: Final Sketch - Scaling Helps avoid distortion Each block represents a specified length. Count the number of blocks along the length and width. Round your length to a whole number that is divisible by the number of boxes. Divide by the number of boxes.