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Moist or wet evidence (blood, plants, etc.) from a crime scene can be collected in plastic containers at the scene and transported back to an evidence receiving area if the storage time in plastic is two hours or less, and this is done to prevent contamination of other evidence.
The exposure to elements such as rain, wind, or heat, as well as animal activity, contaminates the crime scene and leads to the destruction of evidence. Other factors such as not properly securing the crime scene can lead to contamination of evidence. If a crime were committed outdoors and indoors then the outdoor crime scene is the priority.
Crime scene cleanup is a term applied to cleanup of blood, bodily fluids, and other potentially infectious materials (OPIM). It is also referred to as biohazard remediation , and forensic cleanup , because crime scenes are only a portion of the situations in which biohazard cleaning is needed.
In the courtroom, if the defendant questions the chain of custody of the evidence it can be proven that the knife in the evidence room is the same knife found at the crime scene. However, if there are discrepancies and it cannot be proven who had the knife at a particular point in time, then the chain of custody is broken and the defendant can ...
Items need to be collected at a crime scene or a fire scene, ... Control is needed to prevent contamination of the evidence: investigators to the evidence, ...
The Kentucky State Police Laboratory has a debilitating evidence testing backlog that leaves a negative trickle down affect in the state’s criminal justice system by causing delays that affect ...
Crime scenes are normally carefully searched for blood residue. Flashlights held at an angle to the surfaces under examination assist in this, [1] as do luminol sprays which can detect even trace amounts of blood. Presumptive tests exist with which blood can be distinguished from other reddish stains, such as of ketchup or rust, found at the ...
After the trace evidence has been located at a crime scene the next step is to record it. [5] There are multiple ways of recording evidence and that is dependant on the type of evidence found. The first option is to videotape the crime scene. This can be done to provide perspective on the actual location of the evidence throughout the entire ...