The French scientist and criminalist, was a major contributor

The utilization of crime investigation has been around since before the Roman Empire, but the application of scientific practices with evidence and crime scenes is fairly new. It was in the 1800s when scientific advancements accelerated. Roufa’s (2017) article statedThe invention of the camera brought on the use of photography to document and preserve crime scenes. Hydrogen peroxide was discovered to foam as it oxidized when it contacted hemoglobin, demonstrating the ability to test for the presence of blood. (para. 5)Then, in the early 1900s Dr. Edmond Locard, a French scientist and criminalist, was a major contributor in the development of forensic and crime scene sciences. He contributed to dactylography, a study that involves fingerprints, and developed poroscopy, the method of identification through the impressions of pores on fingertips.(Petherick, W A. Turvey, B E. Ferguson, C E, 2010). He is well known from Locard’s Exchange Principle, ” a theory relating to the transfer of trace evidence between objects, stating that “every contact leaves a trace”.”(Petherick, W A et al., 2010. para. 5)The advancements we have today are largely based on the work from the discoveries in the past and the equipment and practices that are used, such as fingerprinting and DNA identification, have made crime scene investigation results more precise. (Roufa, 2017).Crime Scene Investigation Job Duties Crime scene investigation is not limited to investigating a crime scene. There’s a profusion of jobs that branch out of crime scene investigation, including duties such as testifying in court, collecting physical evidence, and maintaining reports. At a crime scene there may be many people working on different things, but they fall under the same category of a crime scene investigator. A thorough search and recognition of the scene must be done. In this stage they must decide what may be evidence, what equipment they need, and who they need on the job.Next, they take notes on what is at the scene, and a description of what is present. Then, a CSI photographer takes pictures of all the physical evidence to document and create a visual representation of the scene. The representations are necessary for court and for viewing after the scene has been cleaned. Lastly, they collect physical and trace evidence that was found. This includes things such as the weapon, hair samples, blood, fingerprints, etc. This must be done carefully so no evidence is tampered with in the collection and transportation process.   If any evidence was tampered with or damaged it may become unusable for court. Later on investigators may be called into court to testify what they saw or what was collected at the scene and how it was handled. ( Byrd, M ,n.d.).Education Requirements Due to crime scene investigation being a broad field with many smaller specific duties inside of it, education requirements may vary from job to job, but generally it requires a background in the natural sciences, criminal justice system, and forensic sciences. Getting a criminal justice degree with a focus on forensics can give you those three backgrounds that you need. To go into a specific field of crime scene investigation, such as blood spatter or DNA analyst, you’d need more extensive schooling in those areas. In-service training is also important for attaining an investigative job. Agencies will have new hires work under or with older and more experienced employees. In-service training gives a better understanding and hands on experience.  (“What It Takes,” 2018).Although, “beyond a degree from an accredited college or university, many CSI positions in state and local law enforcement require CSIs to earn state licensure and/or professional certification, usually within 18 months of being hired.” (“What It Takes,” 2018. para. 8). This requirement varies from state to state, but the majority of them require state licensure.