Forensic Science. Criminalistics Chapter 2 The Crime Scene. Physical Evidence. Any and all objects that can establish that a crime has been committed or can provide a link between a crime and its’ victim or a crime and its’ perpetrator. The Value of Physical Evidence.
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The Crime Scene
Any and all objects that can establish that a crime has been committed or can provide a link between a crime and its’ victim or a crime and its’ perpetrator
Physical Evidence is only valuable when collection is performed with selectivity that is determined by the collector’s knowledge of the capabilities of the crime lab
Physical evidence must be recognized and properly preserved for lab examination or it is useless to investigators and/or prosecutors in a court of law
Duties of the Arriving Officer:
Every individual entering a crime scene can potentially destroy important evidence
Spiral Search Method: Begins from one point of the crime scene and continues in a spiral fashion to another point
What type of search conducted depends on:
Physical evidence must be collected and packaged carefully to prevent contamination, breakage, evaporation, and accidental scratching and/or bending.
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.