Scientific Approach in Criminal Investigation

Scientific Approach in Criminal Investigation

According to Forensic Evidence Criminal Defense Wiki (2016) scenes under which a Crime has taken place has various evidence clues left behind. Major crime scene proof includes the body if it is one victim involved in the crime or can be several bodies. Clothes also serve as proof that help in crime investigations (Hereck, 2016). The materials can either be attires of the individuals involved in the conduct of the crime or the victims of the offense. Weapons employed in the murder or those that aid in perpetrating the felony are also clues that prove the occurrence of the incident. Sometimes traces can be used as evidence and may include metallic objects. Remains of gunshots, broken glasses and stains of food particles can also provide evidence as well as materials that may be part of a building (Hereck, 2016).

Hereck (2016) asserts that any evidence that is physical requires the investigators to evaluate and determine how such proof can be relied upon to provide authenticity to a case. Physical evidence involves things at are tangible. Evidence that is so minute will, therefore, require implements such as a microscope for viewing (Hereck, 2016). Moreover, there is a broad range of potential substances that meet the standards regarded as helpful evidence including hair, blood, fingerprints and body fluids as well as building paint, harmful weapons and footprints.

Similarly, biological remains for example blood also serve as forms of evidence. The materials can be as a result of fights involved between the suspect and the victim leading to an exchange of blood between two parties (Forensic Evidence Criminal Defense Wiki, 2016). A victim can shoot a suspect and in the course of the occurrence blood from the shot individual gets into contact with the shooting person’s clothes. The blood stains in fabric form a basis of the evidence that the crime happened.

Investigators of a crime must ensure that they gather information that is most helpful as an establishment of facts regarding a particular crime. Investigators must collect enough evidence. The individuals gather information that can be sieved through to get the most useful and sufficient information. Samples act as first priorities to the investigator including stains of blood because there might be differences in sample patterns due to several blood splills (Forensic Evidence Criminal Defense Wiki, 2016). The body fluid provides examples that can avail information about the investigation. Blood also should be well investigated including trails moving away from the crime scenes. The trails may provide evidence of a suspect who might be escaping the scene with open wounds (Hereck, 2016). There is significant additional proof of blood samples with genetic makeup found in convicting places. Blood analysis entails comparison of a suspect’s blood and that of the victim collected from the crime scene (Forensic Evidence Criminal Defense Wiki, 2016). Blood samples are therefore a requirement for reference to both the defendant’s blood and that of the culprit.

It is also very essential to compare the genetic makeup of the respondent’s blood and that of the victim for clarity. The analysis, therefore, is necessary to provide differences of the two involved. The endeavor is particularly right in predictable serology examination. Occasional Requests must be made to perform a determination (Forensic Evidence Criminal Defense Wiki, 2016). The analysis, therefore, focuses on the blood samples that are a well-known failure to which the process will be useless (Hereck, 2016). Likewise, if the two parties have the same blood group type, the process is voided as no helpful information will be found.

A crime investigator mostly has various types of evidence in preparation to defend or file a case. The collected evidence may come from individuals who may have been involved directly or associated to a felony by witnesses. A statement may be filed as a confession by the client or by a witness or the directly involved victim. The investigator may also be in a position to find evidence from physical materials that may include weapons used leading physical damages from the victim (Forensic Evidence Criminal Defense Wiki, 2016). A crime investigator may as well have scientific information about a crime through tests from the visible evidence. In the provision of scientific evidence, there is the use of science or technology that helps provide facts about cases or the even truth about an occurrence of a case (Hereck, 2016). Research in science has made it possible to provide tests and analysis of the evidence that determine whether a suspect is to be released or imprisoned.

Forensic evidence involves the use of technology and scientific methods that are put in place during the investigation process and employed to establish facts in preparation for trials in courts. The investigators during preparation for a test do not only rely on witness’s information but also on scientific evidence (Schiro, 2016). The dependence is most important in the cases when there is a lack of physical evidence.


Forensic Evidence – Criminal Defense Wiki. (2016). Retrieved 15 April 2016, from N.p.

Hereck, J.  (2016). Retrieved 15 April 2016, from . N.p.

Schiro, G. (2016). Collection and Preservation of Blood Evidence from Crime Scenes. Retrieved 15 April 2016, from N.p.


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