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The process of collecting physical evidence includes evaluating the crime scene, photographing and sketching the scene, searching for evidence, and properly ...
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Department of Public Safety
To specify procedures concerning initial processing of crime scenes in preparation for collecting physical evidence
The purpose of this General Order is to establish clear guidelines in the collection and preservation of evidence.
PHYSICAL EVIDENCE: Physical evidence includes any and all objects that can establish that a crime has been committed. Physical evidence can provide a link between a crime and its victim or a crime and its perpetrator. This evidence, when presented in a court of law, will assist in determining the truth about a fact in question.
Any item at the crime scene that can be used to solve what occurred constitutes physical evidence. The process of collecting physical evidence includes evaluating the crime scene, photographing and sketching the scene, searching for evidence, and properly collecting and preserving the evidence. To ensure this process is proper and effective, employees collecting evidence will follow the procedures listed in this order.
SU Policy No. 404 - 410.0 Page 2 ii. Preventing access to the crime scene area- the extent of protective measures must be decided on a case-by-case basis PRELIMINARY CRIME SCENE ASSESSMENT: Assessment of the crime scene allows for the determination of the type of incident to be investigated and the level of investigation to be conducted. The investigator in charge will identify specific responsibilities, share preliminary information, and develop investigative plans in accordance with departmental policy and local, state, and federal laws. The crime scene assessment allows for the development of a plan for the coordinated identification, collection, and preservation of physical evidence and identification of witnesses. It also allows for the exchange of information among law enforcement personnel and the development of investigative strategies. INITIAL SEARCH: The investigator in charge will conduct the initial search with the crime scene technician(s) responsible for processing the scene. Conducting a scene walk through provides the investigator in charge with an overview of the entire scene. The initial search provides the first opportunity to identify valuable and/or fragile evidence and determine initial investigative procedures, providing for a systematic examination and documentation of the scene. Written and photographic documentation records the condition of the scene as first observed, providing a permanent record. CRIME SCENE PHOTOGRAPHS: Before a detailed examination of the crime scene is made and before any items are moved or even touched, the crime scene should photographed. Photographs should be taken utilizing overall, medium, and close-up coverage. Detailed photographs should be taken to show items of physical evidence in the condition in which they were found. MEASURING DEVICES: Measuring devices such as forensics scales and other devices are commonly used in crime scene photography to demonstrate relative size in relationships. Nevertheless, the use of such devices in every photograph may cause admissibility problems. Therefore, when the size of an item is of significance, a minimum of two photographs will be taken- the first photograph without measuring devices and the second with measuring devices. DOCUMENTING PHOTOGRAPHS: