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Police Science Crime Scene Investigation

The CSI uses the information he gathers during scene recognition to develop a logical approach to this particular crime scene. There is no cookie-cutter approach to crime scene investigation.

Usually, the first police officers on the scene secure the core area -- the most obvious parts of the crime scene where most of the evidence is concentrated. When the CSI arrives, he will block off an area larger than the core crime scene because it's easier to decrease the size of a crime scene than to increase it.

The CSI calls in any specialists or additionaltools he thinks he'll need based on particular types of evidence he sees during the recognition stage.