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Crime Scene and DNA Basics for Forensic Analysts

Evidence at the Crime Scene

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National Institute of Justice (NIJ) (see reuse policy).

Evidence at the Crime Scene: Introduction

Responding to a crime scene is a critical step in the scientific investigation of a case. Unless the crime scene response is handled correctly, the investigation may be severely compromised. Investigators and crime scene specialists are responsible for identifying, securing, collecting, and preserving the evidence that is submitted to the crime laboratory. The investigator's knowledge in crime scene documentation and the variety of methods for the collection and processing of all types of evidence is crucial. Additionally, many times the investigator must make timely decisions whether to obtain written consent or a search warrant, so that the evidence will be admissible and not subject to a motion to suppress.


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