Essay Sample on Crime Scene Investigations

Finding physical evidence on the crime scene can comprise according to its nature a proof even more useful as it offers several and original traits. Besides, it provides significant information on the conditions of the criminal act or the duties of the different actors. In this paper is aiming to highlight to been followed in an occurrence of a crime scene to investigate the physical evidence correctly- a source of information to assist the police investigation in succeeding.

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Introduction

The crime scene is a physical scene that might give a detailed proof to an investigation. It may take account of buildings, vehicles, human body places in the free air or items that are found in such locations. "Crime Scene examination" generally refers to an examination forensic and scientist's skills are put in to use to gather and preserve evidence of a crime. One thing steady about the crime scene is their inconsistency (Deeb et al. 650-654). A crime scene can be classified in several ways because of their diversity. Classification can be depending on the location of the original criminal action, rating based on size and classification based on based on the type of crime committed. Scene's physical evidence forms the foundation of the scientific crime scene investigation.

A crime scene can be classified in several ways because of their diversity. Classification can be depending on the location of the original criminal action, rating based on size and classification based on based on the type of crime committed. There are steps and order to be followed to attain crime scene process; Scene's physical evidence forms the foundation of the scientific crime scene investigation; Crime scene procedures; Documentation; Collection and Preservation of evidence and finally Reconstruction of Crime Scene.

Uses for and Information from Physical Evidence

The objective of any scene investigation is to recognize, preserve, collect, interpret and reconstruct all the relevant physical evidence at a crime scene. In other words, evidence collection should be prioritized to the prevention of loss, destruction, and contamination. Importance of prioritizing is to provide for the timely and methodological preservation and collection of evidence. For, instance, in hunting crime scenes, what is frequently goes unnoticed, however, is a geographic viewpoint on the actions before an offense (Rossmo, 165- 180). A forensic laboratory examines the physical proof to give the investigator with more information about the evidence is an effort to solve cases.

Suspect Identification

The forensic test is a procedure of steps; recognition, individualization, identification, and reconstruction. A suspect identification is accomplished by the first three stages that lead to an individualization or determination of an element of physical evidence. Individualization is made easier by comparison examination; fingerprint evidence is the best example of individualization.

Unknown Substance Identification

Crime scene investigators most of the time face unknown capsules, powders, tablets, and liquids at times, several of which are controlled substances. Because the majority of drugs are white, it makes it determine them visually tricky. Colorimetric tests are a great approach to presumptive drug identification. Positive examinations are frequently reported differently (Elkins et al. 306-310). It is typical of physical proof, and it applies mostly in the identification of poison, drugs and some bacteria such as anthrax.

Crime Reconstruction

Reconstruction of crime is the final stage of the legal test process. The investigator of the crime scene in highly interested in how the crime happened than individualizing or identifying the evidence at the scene.

Provision of Investigative Leads

An investigator can get direct information from physical evidence. However, not all physical proofs will provide links to the suspect but include information to investigation leads. Every crime scene has a definite indication that helps the investigator, such as; fingerprint, footwear can show the manufactures, size and the type of shoe worn by the suspect.

Crime Scene Investigation and Science

The investigation is not a mechanical practice relegated to technicians who pass through a number of steps to make a crime scene but it is a dynamic practice that needs an active approach by the investigator who should be aware of the linkage principles of the evidence, make good use of the scene analysis and definition skills to be capable of giving an opinion on the reconstruction of the scene. The investigation depends on scientific methods.

General Crime Scene Procedures

Scene Management

Currently, crimes are solved teamwork investigators and crime scene specialists and by the combined uses of skills and procedures knowing the power of crime scenes, physical evidence witness and records. Regrettably, many cases and routines have indicated that despite the presence of crime technologies also trained specialists the effectiveness of crime scene investigator is compared to the supportive management team. Human resources management, information management, technology management, and logistics management deficiencies are four distinctive but interrelated components of crime scene management, and they will expose the entire crime scene investigation. These components depend on first wants for best ongoing communication between all the specialists in the whole investigation process.

First Responding Officers

Police officers, fire department personnel or emergency medical specialists are usually the first respondents at a crime scene. They see the crime scene at its original condition, there being at the crime scene gives a basis of a successful or unsuccessful resolution of the investigation. They must play their role at the stage at to remember not to destroy any links to the suspects. Fist respondent should always maintain an objective and open mind when approaching any crime scene and should keep safe upon arrival at the scene.

Duties

Dyson (176) outlines that the first respondents have the following responsibilities towards a victim/ victims at the crime scene. Firstly, the first respondent must work to search and arrest the suspect is still at the crime scene. Secondly detaining all witnesses since they have precious information about the crime scene and to keep the witnesses separated to preserve their objectives, and, finally they have a role of protection of the crime scene, start by enclosing the area with barrier tape, official vehicles or using any other means to keep the place out of reach. To note and communicate to the investigative personnel all the time and changes made to the crime scene

Securing the Crime Scene

The Locard Exchange Opinion is the foundation for connecting physical evidence to the suspect, victim and crime scene. Anyone moving in a crime scene can affect the view and the evidence at the stage, so entry to the crime scene should be controlled and, if conceivable, prohibited except for important crime scene specialists. Physical barriers like tapes and vehicles that assist in protecting the crime scene should be put in place as fast as possible by the first responders. Once scene barriers have been placed in order, one officer will be signed as the scene security officer. The officer should be accountable for controlling entrance into the crime scene. A contamination log must be kept to help record every entry to and from the crime scene. Using multilevel security method can effectively prevent unwelcome entries. Rarely will the crime scene investigator be the first at the crime scene. After arrival, the first move is to calculate the proven secure areas and make changes if necessary.

Crime Scene Survey

Upon arrival, of the crime scene investigator and scene security has been estimated, the first scene survey must be carried out. That is done together by the crime scene investigator, and the first responder will usually perform the study. The lead investigator when available also gains from participating. Using instant photography for primary documentation is also be helpful. The first examination conducted by the crime scene investigator is surveyed.

Crime Scene Documentation

Once the first scene survey has assessed the crime scene, the condition at the crime scene must be documented. Documentation is essential to stage in the handling of the crime scene. The reason for documentation is to record the situation lastingly and condition of the crime scene and its physical evidence, documentation methods, taking of notes at the crime scene using videotapes at the crime scene, taking photographs at the crime Scene, sketching the crime scene, and, using digital imaging technology.

Collection and Preservation of Physical Evidence

After completing the documentation of the crime scene, evidence collection and preservation begin. One person should be appointed as the evidence collector to make sure that the group of evidence is done, well packaged, marked appropriately, sealed, and preserved reliably. No element of proof should be missing or contaminated.

Crime Scene Reconstruction

Reconstruction is the process of determining or doing away with the events that took place at the crime scene by analyzing the appearance of the crime scene, the location and the physical evidence situation. Reconstruction process involves scientific investigation, interpretation, and laboratory testing physical evidence. Reconstruction depends on the experience of the investigator and scientific experimentation (Horswell, 54). It includes all investigative info plus physical analysis and interpretation model to a possible clarification of the questionable actions and related activities.

Conclusion

The only way, methodology to ensure that an investigation is conducted justice correctly is achieved currently is through scientific crime scene investigation. Using this methodology will help to avoid the abrupt end of an unfinished investigation and provides a chance for the best use of physical evidence discovered at the crime scenes.

Work Cited

Deeb, Haneen, et al. "Police officers' perceptions of statement inconsistency." Criminal Justice and Behavior 45.5 (2018): 644-665.

Dyson, Matthew E. "Always on Duty: Can I Order You to Report Crimes Or to Intervene." Mil. L. Rev. 224 (2016): 176.

Elkins, Kelly M., et al. "Colour quantitation for chemical spot tests for a controlled substances presumptive test database." Drug testing and analysis 9.2 (2017): 306-310.

Horswell, John. "Crime scene investigation." The Practice Of Crime Scene Investigation. CRC Press, 2016. 29-72.Rossmo, D. Kim. "Place, space, and police investigations: Hunting serial violent criminals." Principles of Geographical Offender Profiling. Routledge, 2017. 165-180.