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Processing a crime scene
What are the importance of criminal investigations
Principles of criminal investigation
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Criminal Investigations are ways that crimes are looked at and criminals arrested (In Encyclopædia Britannica, 2011). It is a huge part of getting criminals off the street. Investigation is a crucial aspect for many different crimes such as, but not limited to, theft, robbery, burglary, arson, murder, and assault. Criminal Investigations can take days or up to many years to solve; some cases are never closed. Not only can investigations last for extended periods of time, the lives of those working on such cases can be put in danger.
Crime scene processing plays a large part in bringing a victim justice. However, crime scene processing is also an area that needs improvement due to some errors that come from this tedious process. This is a lengthy process that needs to be documented at every point. First, there will be a walkthrough of the crime scene. Following that, criminal investigators will go inside the crime scene and start taking photographs, but will not touch anything. As soon as that process is completed, investigators will walk through the scene, yet again, bagging all the evidence to send to the lab. Errors can be made during this step, which could include documented evidence getting lost or altered if not documented properly. Finally after evidence is sent to the lab and processed, the results will be sent to the top detective. The investigation continues and the investigators on the case must be sure to document everything that is discovered or carried out; if details are not recorded correctly errors can be made and important facts missed. A chain of evidence must be kept as investigators continue to collect information. This collected evidence will be given to one person to keep track of, who would als...
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Criminal investigation. (2011). In Encyclopædia Britannica. Retrieved from
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On February 27th, 2014 I had the pleasure to interview Detective Vincent Velazquez who was referred to me by Professor Paul Guerrucci. Vincent currently works at the Atlanta Police Department located in 226 Peachtree Street, Atlanta, GA 30303. On the day of the interview, I was a little anxious since this was actually the first time I interview a crime investigator, however Vincent was very professional and he allowed me to record the entire conversation. I was able to ask questions about his personal life, full details of his profession, current case assignments, criminal investigation procedures and existing problems in the investigation process.
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 the year 2014, law enforcement in the United States estimated 1,165,383 violent crimes reported (“D2014VC”). Imagine the number of people needed get to the bottom of all of those cases! There are an abundant amount of Americans solving mysteries every day to keep others safe. Crimes are committed all around the United States at every second of the day! In John Grisham’s The Pelican Brief, he displays a firm relation between investigators and lawyers through the Criminal Justice System of acquiring suspects and evidence, indicated in the book with an exploration of the scandals of Supreme Court Justices Rosenberg and Jensen (Grisham).
Lyman, D. Michael; Criminal Investigation, The Art and Science; 3rd edition, 2002 Prentice Hall. Pgs. 188-200.
Fairchild, H. & Cowan, G (1997). Journal of Social Issues. The O.J. Simpson Trial: Challenges to Science and Society.
... more than twelve million people tuning in to watch CSI (Shelton, n.d.), and with science and technology continuing to evolve so rapidly, we will continue to see a substantial influence on American criminal justice through their impacts on potential juror expectations. Our criminal justice system should seek to adapt to these changes as supposed to fight them, the way the system is set up juror verdicts are expected to be a reflection of our society’s values. With those value will change and jury verdict will reflect those changes in popular culture. In adapting to such changes, we must invest in funding and training law enforcement to collect and analyze scientific evidence. While we adapt to those changes it is crucial that the jury is carefully instructed about the nature of such evidence as well as properly selected by a Voir Dire process to identify biases.
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.
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.
Criminal Investigative Analysis is an investigative tool used by law enforcement officials to help determine the unknown offender of a specific crime, usually involving violent crimes. The purpose of Criminal Investigative Analysis is to create a profile containing characteristics of the offender who committed a certain crime. Law enforcement then uses this profile to help determine a possible suspect that fits into that profile. The Criminal Investigative Analysis has been crucial in solving some very large cases, where law enforcement had no leads and used this tool to come up with a possible suspect. The media has influenced the view that the public has between what the media portrays how law enforcement conducts an investigation
There are several steps that need to be taken in order to process a crime scene. Some of the steps include: securing the scene, a detailed search, documenting the crime scene, collecting and preserving evidence, and finally releasing the scene. All of the following steps are crucial to avoid any possible contamination or otherwise compromise the scene before it can be released. Few, if any additional opportunities exist when processing a crime scene, so the first time is most pertinent.
Forensic Science, recognized as Forensics, is the solicitation of science to law to understand evidences for crime investigation. Forensic scientists are investigators that collect evidences at the crime scene and analyse it uses technology to reveal scientific evidence in a range of fields. Physical evidence are included things that can be seen, whether with the naked eye or through the use of magnification or other analytical tools. Some of this evidence is categorized as impression evidence2.In this report I’ll determine the areas of forensic science that are relevant to particular investigation and setting out in what method the forensic science procedures I have recognized that would be useful for the particular crime scene.
The transitional growth in the forensic science sector has not been without challenges. Though the world has experienced increased capabilities and scientific knowledge, which has led to faster investigations and results, many forensic experts have argued that forensic laboratory testing, in the light of 21st century technological advancements, is yet to meet the expected rate in quick available testing and analysis (Mennell & Shaw, 2006). This is with respect to the growing rate of crime and the high demand of quick crime scene testing and analysis. In the science of crime scene, analysis and interpretation of evidence is majorly dependent on forensic science, highlighting the change in the role of forensic sciences (Tjin-A-Tsoi, 2013). In the business of forensic science, time is beginning to play important role in the evidence testing and analysis which is becoming crucial in reducing ...
Criminal investigators are professionals in the law enforcement team who try to solve crimes, prevent the occurrence of future crimes, and searching and detaining suspects. The two categories of criminal investigators are private and public criminal investigators. The level of training that these professionals go through is different which leads us to the differences between public and private criminal investigations.
Forensic science has now been recognized as an important part of the law enforcement team to help solve crimes and cold cases. The advances in technology are being used each day and we must continue to strive to develop better advances in this field. The recent discovery of using DNA in criminal cases has helped not only positively identify the suspect, but it has helped exonerate hundreds of innocent individuals. “With new advances in police technology and computer science, crime scene investigation and forensic science will only become more precise as we head into the future.” (Roufa, 2017) Forensic science and evidence helps law enforcement officials solve crimes through the collection, preservation and analysis of evidence. By having a mobile crime laboratory, the scene gets processed quicker and more efficiently. Forensic science will only grow in the future to be a benefit for the criminal justice
The criminal investigation process is able to achieve justice to a great to a great extent. They are effective in achieving justice, as they are able to balance the rights of the victim, offenders and society and also provide fair and just outcomes. For these reasons, the criminal investigation process is largely able to achieve justice.