" Forensics" Reconstructive Patterns

reconstruction evidence provides information about the events preceding, occurring, during and after commission of a crime (Nordby). On the other hand, associative evidence is the tools used for reconstructing a crime scene. They generally locate evidence that can be used to associate or disassociate a suspect to a crime. Bullets, bodily fluids, firearms, and fingerprints are examples of associative evidence. In addition, Biological evidence is very useful especially if the criminal is a repeat offender. This is because; when an offender is charged with a crime DNA specimens are taken and entered into the system. If a repeat offenders bodily fluids (such as; blood or semen) are found at the scene and sent to Forensic laboratories when they DNA is processed and results become available the offender is caught. After that it is just a matter of locating the criminal to charge them with the crime.  

Furthermore, there are many other ways of processing evidence.  Evidence that can be collected from a crime scene Include physical evidence, and trace evidence. Some examples of physical evidence are tracks and fingerprints. Fingerprints can also be very useful if the suspect is a repeat offender because; along with DNA samples fingerprints are also recorded in the system. Tire tracks can be useful because it leaves behind a pattern showing some or all of its surface characteristics, known as an impression. The collection and analysis of impression evidence found at the scene of a crime can often be very important to an investigation. The collection of objects, marks and impressions that make up the physical evidence of a crime is a specialized task. The general principles of preserving physical evidence and assuring a secure chain of custody apply whatever the crime  (http://www.enotes.com/forensic-science/physical-evidence).

 Locard's Exchange Principle dictates that evidence, both physical and biological, is to be found at the scene of a crime because the perpetrator always leaves something behind by having contact with victims and objects there. (http://www.enotes.com/forensic-science/physical-evidence)