Crime Scene Reconstruction

Topics: 3D scanner, 3D modeling, 3D computer graphics Pages: 7 (2544 words) Published: September 30, 2010

Clint Fritz
August 22, 2010
Devry University

Table of Contents

Types of Crime Scene Reconstruction3
Specific Incident Reconstruction3
Specific Event Reconstruction3
Specific Physical Evidence Reconstruction4
Capturing the Measurements4
Quick Record to Preserve the Crime Scene5
Multiple Scans of the scene to create one model5
Calibrated Digital Cameras5
3D Lasers5
Model the 3D Crime Scene6
3D Software6
360 Degree View6
Virtual Tool7
Measure Distances at the office7
Calculate trajectories of blood spatter7
Measurement can be taken at a later time7
Never have to worry about not getting a measurement7
Comparison of Traditional Sketches7
Lack of Information7
Investigators Collaboration4
Test Theories8
Confirm Witnesses Testimony8
Presentation to the Jury9
Virtual Tour9

New technologically advanced 3D computer reconstructions allow the viewer to see real images of the crime scene much like watching a television show. The virtual world can be created using 3D lasers and computer software. The crime scene is taking on a completely different view. No longer is the crime scene restricted to inside of the crime tape. It has moved beyond a physical barrier allowing analysts to dissect the crime scene to identify evidence often missed simply walking through the traditional steps of sketching. There is now the opportunity for anyone to revisit the crime scene the next day, next week, or years from now. This is an important function to allow the jury to see exactly what the investigators and witnesses saw at the crime scene leaving nothing to the juror’s imagination. According to the Department of Safety for the State of Connecticut, forensic crime scene reconstruction “is the process of determining the sequence of events about what occurred during and after a crime” (Department of Public Safety - Scientific Services, 2010). Crime scene reconstruction normally starts ideas of what happened during the crime and then moves to an analysis of the evidence at the scene.  It focuses on gathering as much data and evidence to form a valid hypothesis. The hypothesis can then be subjected to various tests to prove or disprove the overall interpretation of the reconstruction. Once the reconstruction is formalized a theory can be determined in support of the reconstruction. There are three types of crime scene reconstructions. They are specific incident reconstruction, specific event reconstruction, and specific physical evidence reconstruction. Specific incident reconstruction involves reconstructing a crime scene where an accident or incident occurred. This will be needed during such incidences as traffic accidents or homicides. The purpose is to identify the types of evidence that can be associated with these incidents. Using specific event reconstruction, the sequence of events or timelines can be established. This form of reconstruction looks at how all of the pieces of the puzzle fit together. With specific event reconstruction the sequence of events can be determined. The final type of reconstruction is specific physical evidence reconstruction. This involves evidence such as blood and bullets. Through reconstruction of blood splatter, it can be determined where the shooter was standing during a homicide. It will also help identify the location of the bullet if it is exits the body of the victim. Capturing the crime scene is an important part of the crime scene reconstruction process. Typical methods include sketching the crime scene using graph paper and a pencil or taking photographs from a digital camera. Both of these methods do provide a snapshot of the crime scene for preservation but, they do not capture the scene in its entirety. A sketch will note measurements of physical evidence in their relation to the victim’s body or to such items as furniture and doorways. However, it is completely relying on the investigator to supply...

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