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Processing a crime scene
Crime scene processing
Processing a crime scene
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I feel the most important crime scene responsibilities are scene safety and security, evaluation of the scene, and documentation. The first responder’s primary responsibility should scene safety and security. This will protect the crime scene, prevents entry or access from persons who are not unauthorized or have no specific reason to be there, and prevents the loss, alteration, movement and contamination of evidence. If the first responder has identified evidence, he or she should document or photograph, but not touch or handle the evidence, until investigators arrive (Geberth, 203).
The second important responsibility is an evaluation of the scene. Since anything and everything can be considered evidence, it is vital the officers perform an initial evaluation of the scene, identifying anything he or she observes about the victim, the scene, and the surroundings. If paramedics have been called, the first responder should try and photograph
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This has several important parts to it. By documenting dates, times, conditions, and other events related to the crime scene it can help guide a more effective search. Also, any observations or information provided by the first responder or other officers should be indicated here. The photographic log should also be documented, which can provide technical descriptive to record the varying views of the crime scene photographs. Another item that is important in the documentation aspect is the diagram/sketch of the crime scene. This would include measurements of the scene, relation to size and distance, and location of evidentiary items. Finally, documentation should include the evidence recovery log and latent print log. Documentation should indicate where these were recovered, how they were recovered, who discovered the evidence, any markings or other identifiers on the evidence, that may accompany the chain of custody log (Crime Scene Investigator Network,
The photographic logs details who took the photos of the scene, which light was used to take these pictures these pictures will later be used to construct a diagram. Finally, the evidence recovery log which lists what piece of evidence was recovered such as bone fragments, articles of clothing, or bullets from the crime scene (Swanson, et al., 2012) In this series, Dr. Brenan can be seen accompanying FBI agent Seeley Booth to interrogate both witnesses and possible suspects. Further, in the series, Dr. Brenan can be seen in possession of a weapon and join the hunt for the criminal. In reality, the forensic investigator is needed in the scene of the crime in order to collect evidence. This type of portrayal from the media is leading the public to believe that both the agent and the investigator or attorney will engage in the “exciting adventures” when the reality is it is just the way the media portrays these types of scenarios (Surette, 2015). The way the series portrays forensic science differs from the real world even though the author of the series is a forensic anthropologist
If handled with care the evidence can be the best assistance to the crime investigator and can be used as a major proof in court. To improve the investigation any detective or expert has to admit the necessity of the non-movable items observation and processing apart from the regular movable evidence collection.
Brief history of Forensic, it surfaced in the state of San Francisco in the 1850’s systematic photography was being used to obtain criminal identification. Later on in the 1920’s “Los Angeles Police Department established the first police department crime laboratory in the United States (Forensic science timeline (n.d). Forensic continued to progress over the years to became one of the most innovating fields in the criminal justice system. Forensic help in the prosecution of many cases as well as exclusion of the wrongfully accused (Forensic science timeline (n.d). Forensic tech work primarily for local governments and state in police departments, coroner offices, and crime laboratories. This field is a combination of lab and field work the best of both worlds (Career guide for forensic science technician (n.d). This is what makes Forensic Science Technician the field of interest; the customary duties of a forensic science technician consist of gathering evidence, investigation of evidence collected, and reporting their discoveries in writing and may also be called into a court of law (criminal or civil laws) to present their finding before a judge (Career guide for forensic science technician (n.d).. There are several different areas of expertise in the field of a forensic technicians are often responsible or specialize in particular types of evidence such as biochemistry, ballistics, fingerprinting, and handwriting analysis. It has been said that forensic science technicians are mostly call upon to assist in two places on crime scenes and in crime labs (Dillon .H, 1999). Crime scenes contains that valuable evident that must be careful collected and preserved to help with the reconstruction of crimes by theorizing the events ...
Crime scene technicians are able to work alongside law enforcement professionals at all levels, from the local and county police officers, and prosecutors to special agents of all Federal Bureau of investigations. A crime scene technician uses clues along the way with the help of science and technology to get useful evidence. A technicians job is to assist police investigators in figuring out who was involved at the scene, how it happened, and what happened. When arriving at the scene the responsibilities a technician must take are: securing the crime scene, take detailed measurements, sketch and diagram the scene, take photographs, package and label evidence, and write a report. The crime scene technician performs lab tests on weapons fibers, hair, and tissue.
Crime scenes are known to have many clues left behind. The obvious would be a the body or bodies, clothing, and sometimes even the murder weapon. While these are great way to solve a case there's another kind of evidence; trace evidence. Trace evidence are small pieces of evidence that are laying around a crime scene. There are many types of trace evidence some of them include metal filings, plastic fragments, gunshot residue, glass fragments, feathers, food stains, building materials, lubricants, fingernail scrapings, pollens and spores, cosmetics, chemicals, paper fibers and sawdust, human and animal hairs, plant and vegetable fibers, blood and other body fluids, asphalt or tar, vegetable fats and oils, dusts and other airborne particles, insulation, textile fibers, soot, soils and mineral grains, and explosive residues. Although these are the most common found elements, they are not the only ones. The Trace Evidence Unit is known to examine the largest variety of evidence types and used the biggest range of analytical methods of any unit. materials are compared with standards or knowns samples to determine whether or not they share any common characteristics. In this paper I will discuss the different kinds of trace evidence and how crime scene investigaros use it to solve cases and convict criminal.
In today’s time, modern Crime Scene Investigation has increased rapidly. From throughout the late 1900’s and in the early 2000’s (Taylor 1). For all of the evidence that they find, a solid foundation has formed over the thousands of years of Crime Scene
Terms such as "chain of custody," "forensic evidence," and "crime scene protocol" are commonly used by investigators to ensure accurate documentation and preservation of evidence. According to Smith (2018), understanding this specialized lexicon is essential for maintaining the integrity of the investigation process and ensuring that all team members are on the same page regarding procedures and protocols. This shared vocabulary not only facilitates clear communication, but also helps to streamline the investigative process by reducing misunderstandings or confusion. In addition, the use of specialized language within the community of Crime Scene Investigators serves as a form of professional identity and expertise. By adopting these specific terms and techniques, investigators establish themselves as knowledgeable experts in their field, further enhancing their credibility and reputation among peers and colleagues.
Collection of evidence is usually a term designated to refer to the collection of physical evidence, government agencies such as police or environmental protection departments will have their own methods for the collection, storage and conservation of physical evidence and it is the responsibility of forensic personnel to adhere to these set guidelines. General principles which are shared amongst various agencies include, the creation of contemporaneous notes, recording the collection of evidence via photographing, videotaping and/or audiotapes, preserving the crime scene by sealing off the location and only allowing designated personnel to enter, avoiding contamination of the crime scene by investigators through the use of full body covering and also preventing cross-contamination with the scene and any suspects.
Collecting evidence from a crime scene is a crucial aspect of solving crimes. Before evidence can be seized, there must first be a court order approving the search of the crime scene and the seizure of the evidence found at the scene. Standard protocol for officers is for them to always use latex gloves, avoid plastic bags, double wrap small objects, package each object separately, and to collect as much evidence as possible. It is better to have too much evidence than to not have enough. There are countless amounts of evidence that can be found at a crime scene.
When the investigator arrives at the primary scene, the first responsibility is to verify the condition of the victim and then assure that the primary crime scene is intact. Basically, this action is to reinforce the First Officer's duty to assure crime scene protection. This is usually accomplished during the preliminary "walk-through," as the First officer provides all of the information he or she has ascertained since their arrival and during their crime scene protection phase as discussed earlier. This preliminary "walk-through" is critical since
Imagine pulling into your driveway and seeing your neighbor’s house surrounded by police, flashing lights, and caution tape with bodies covered in white sheet on the lawn. It was a drive by shooting. Next, a van pulls up and a Criminal Investigator steps out and starts assessing the crime scene. She begins taking photos, marking shell casings, packaging evidence, documenting tire treads on the pavement and inspecting and collecting DNA evidence from the bodies. Criminal Investigators are highly trained college graduates that are a vital part of bringing criminals to justice.
Make sure the crime scene is safe and secure. Once the crime scene is secured, that will be the time to start questioning the victims, witnesses and or the suspects. This would also be the time for some officers to conduct neighborhood canvassing (Hess, K.M. & Orthmann, C.H., 2013). I believe this strategy is important to a follow-up investigation because the witness might hold back information, because they might feel that the information they have is not useful.
Razzaq, N. Z. (2008). Visual Documentation in Crime Scene Investigations. Retrieved June 3, 2011, from http://policelink.monster.com/training/articles/17221-visual-documentation-in-crime-scene-investigations
Now that the crime has been detected and perpetrators have been cleared from the area, officers can move on to the next objective of locating, recording, and processing evidence while observing all constitutional consideratio...
Crime scene investigation is the use of physical evidence at the scene of the crime committed, also reasonable and unreasonable reasoning to gain knowledge of the events surrounding the crime. Criminal investigators pursues to establish the methods. Motives, and identities of criminal. This paper will go into great depths of how to conduct an investigation and the proper way to obtain the information. After reading this paper you should be able to know step by step how to keep notes, take accurate photos and a variety of other things that will allow you to conduct a successful investigation.