Crime scene measurement
Crime scene measurement (Forensic Science)
After a crime scene has been identified and the evidence found there has been located, numbered, tagged, and photographed, the scene must be measured in detail. This procedure allows investigators to reproduce the scene later, with all items of evidence and other important items depicted. This reproduction, made to scale, may take the form of a detailed sketch; it may be used for investigative purposes, for courtroom presentation, or both. A three-dimensional reproduction of the crime scene may also be made to assist jurors in visualizing the scene as it was found. Photographs are helpful, but they are limited because they are two-dimensional and do not indicate the exact locations of all the items present and the relationships among the items.
When a crime scene is measured, it is critical that each item be measured from a fixed point, so that it can be repositioned in its exact location at a later date. It would not be helpful, for example, to position an item found in the street by measuring its position in relation to a car parked next to the curb, because the car will be moved at some point. The position of an item in the street should be measured from something that will not move, such as a piece of curb or a point on a building. For a crime scene in a house, a measurement could be made from a specific point on a given wall.
Using the example of a crime scene in the street, a measurement could be made from curb prolongations...
(The entire section is 516 words.)
Further Reading (Forensic Science)
Gilbert, James N. Criminal Investigation. 6th ed. Upper Saddle River, N.J.: Pearson Prentice Hall, 2004.
O’Hara, Charles E., and Gregory L. O’Hara. Fundamentals of Criminal Investigation. 7th ed. Springfield, Ill.: Charles C Thomas, 2003.
Weston, Paul B., and Charles A. Lushbaugh. Criminal Investigation: Basic Perspectives. 9th ed. Upper Saddle River, N.J.: Prentice Hall, 2003.
(The entire section is 55 words.)