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Known exemplars taken from a seized weapon can be compared to samples recovered from a scene using a comparison microscope as well as newer 3-D imaging technology. Striation images can also be uploaded to national databases. Furthermore, the markings can be compared to other images in an attempt to link one weapon to multiple crime scenes.
Crime scene reconstruction help put pieces of a case together. The steps to crime scene reconstruction involve: the initial walk-through and examination of the crime scene, organizing an approach for collecting evidence, formulate a theory, use the theory to track down suspects, reconciling all evidence that refutes the hypothesis or creates one.
Bloodstain pattern analysis is the scientific examination of blood spatter patterns found at a crime scene to reconstruct the events of the crime. Comparative forensics is the application of visual comparison techniques to verify similarity of physical evidence. This includes fingerprint analysis, toolmark analysis, and ballistic analysis.
Contaminated evidence is any foreign material that is introduced to a crime scene after the crime is committed. [1] Contaminated evidence can be brought in by witnesses , suspects , victims , emergency responders , fire fighters , police officers and investigators.
The key to solving JonBenét Ramsey's murder could lie in evidence found at the scene nearly 30 years ago.. When police searched the 6-year-old’s home in Boulder, Colo., on Dec. 26, 1996, they ...
When a crime is committed, fragmentary (or trace) evidence needs to be collected from the scene. A team of specialised police technicians goes to the scene of the crime and seals it off. They record video and take photographs of the crime scene, victim/s (if there are any) and items of evidence. If necessary, they undertake ballistics examinations.
Now 80, Ramsey is pushing for local authorities to allow an outside lab to test crime-scene evidence from the case. “We have requested a meeting with [Boulder Police Department] Chief [Stephen ...
The defence’s case has repeatedly sought to cast doubts on the collection and preservation of evidence from the crime scene – indicating that the investigation into the murders may have been ...