1. CRIME SCENE - A crime scene is any physical scene, anywhere that may provide potential evidence to an investigator. It may include a person’s body, any type of building, vehicles, and places in the open air or objects found at those locations.
A Scene of occurrence of a crime is the place where a particular crime has been committed or where physical evidence of such crime is found when it is first brought to the notice of the police. It is a starting point for the investigator, which provides him with the information on the victim and the suspect, and to reconstruct the crime. This image depicts the crime scene as it includes the place where the crime has been committed. Including the dead body, blood stains, knife used for murdering.
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THE IMPORTANCE OF CRIME SCENE IN THE FORENSIC SCIENCE:-
The crime scene has not always been conceptualized as part of forensic science. In the past, activities at the crime scene have been viewed as ‘police work’; processing and managing the crime scene has been viewed as a technical discipline (Crispino 2008; Millen 2000). The role of forensic science has been understood as beginning once the items collected at the crime scene arrive at a forensic laboratory. However, in both the forensic world and the policing world (if not other agencies in the criminal justice system), there has been an increased focus in recent years on what happens at the crime scene.
In short, crime scene processing has come to be recognized as a critical stage in the forensic process. Maintaining the integrity of the crime scene through the management of personnel in attendance is crucial. If the front end of a criminal investigation is not handled effectively and reliably, then there are significant flow-on effects in the forensic process and, potentially, in justice outcomes (Brown and Willis 2009; Julian et al 2011; Kelty, Julian and Robertson 2012; Porter 2008). In this article, we draw on two case studies to illustrate the critical issues that can arise at the crime scene and the factors that can influence the value of forensic evidence if the crime scene is not managed effectively
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The exposure to elements such as rain, wind, or heat, as well as animal activity, contaminates the crime scene and leads to the destruction of evidence. The risk is greatest when crime scene investigators fail to secure the crime scene properly. Destruction or deterioration of evidence due to environmental conditions such as heat, cold, rain, snow and wind are problems associated with outdoor scenes. Evidence that cannot be protected under these conditions should be collected expeditiously without compromising its integrity. Investigators who encounter a combination of an indoor and outdoor scene should give priority to processing the outdoor component. Nighttime outdoor crime scenes are particularly problematic. Regardless of the quality of the light source used to illuminate the scenes, the lack of sunlight can lead to investigators inadvertently missing or destroying evidence. Whenever possible, outdoor crime scenes should be held and secured until daylight for processing .
Indoor crime scene: - Evidence at an indoor scene is generally less susceptible to loss, contamination and deleterious change. Indoor crime scenes are usually easier to secure and protect, and securing a scene can be as simple as closing a door.
Conveyance: - Conveyance is a means of transportation. Types of crimes committed in conveyances include the following:
1. Vehicle
Forensics is a very complex field. If the crime scene is not secured correctly, or piece of evidence is handle wrong or "contaminated", an entire case can change in favor of the culprit. JonBenet Ramsey case is a prime example of police failing to secure the crime scene and due to that valuable evidence is lost forever. The mysterious death of JonBenet Ramsey (the daughter of a socialite and a wealthy businessman) was a case that could have been solved if the crime scene was correctly secured.
Evidence is vital for any crime scene. No matter the case, police need to be carefully precise, speedy, and methodical to be able to collect this crucial evidence. With the very well handled cases out there, some slip through the cracks. Evidence that is linked to a crime can be contaminated, destroyed, or forgotten about which leads to finding a suspect to be hard. One example of this happening is the infamous murder case of JonBenet Ramsey.
In this paper I will be comparing contrasting two various aspects of forensic sciences used, and talking about the different tactics used to identify suspects; as well as the contrasts between the two methods. The man I will be talking about is John Wayne Gacy. The two methods I will be going over are, Finger print DNA and Forensic toxicology. These two are very similar, but made substantial differences in the evidence in his case. John Wayne Gacy was a murderer from Chicago, Illinois.
Forensic science has contributed to wrongful convictions and the correction of wrongful conviction by bringing to surface the issue of how involved flawed forensics has made an impact. In Gary Dotson case, false claims were made involving the forensics that was used throughout the case, in such cases as blood comparison and analysis of hairs. The correction to the field of forensics associated with allowing wrongful convictions to be overturned because it reveals the flaws in forensics that previous cases used to implement and by demonstrating how certain types of forensics are unreliable and invalid (Garrett, 2011). There are a few cases that the forensics completed mislead the jury because they were not showing the truth but rather flaws.
However, the way the glass evidence at the crime scene was documented, collected, and preserved absolutely would have had an impact on the examination results at the lab. The glass evidence was mishandled as it was reportedly transferred from an envelope to a plastic bag during the investigation, which could have resulted in further loss or contamination of the evidence. Overall, the mishandling of significant evidence compromised the reliability and admissibility in court. Again, this example of mishandling of evidence posed as another contention point within the case and resulted in much
Compelling Evidence In today’s society, high-tech gadgets and the media have given the impression the essential necessity for forensic evidence in order to convict. Once in a while, cases like the Laci Peterson murder come along with little forensic evidence but a whole lot of circumstantial evidence and motive. In the following paragraphs, I will discuss the forensic evidence discovered that led to the conviction and death sentencing of Laci’s husband, Scott Peterson.
Science has come a long way over the years. It has helped countless every day struggles and cure diseases most commonly found. What you don’t hear about however is the advancement of forensic science. Forensic science has helped solve countless cases of murder, rape, and sexual assault. In the case of John Joubert, it helped solve the murders of three young boys with one small piece of evidence that linked him directly to the crime.
I would also use photographs to document the scene when it comes to injuries sustained by the victim and other important pieces of evidence such as things the suspect may have dropped or left behind that may contain important details of the attacker. A sketch would be used to determine where the evidence was found as well as location of suspect in relation to the break in and the assault. This would be more accurate when it comes to precise measurements. Maintaining the integrity of the evidence by having a proper chain of custody is important to a case or investigation. Every piece of evidence must be accounted for and logged, as well as who has had access to the evidence and where the evidence has been stored.
The time the diagram is drawn will be written down as well. The diagram will have an overhead view of the crime scene. The scene will be drawn to scale. It will show what room evidence was found in and where. Also it will show you what was already in that room and is not considered evidence.
The former being defined as the evidence collected in order to convict or rule out suspects, and the latter being defined as the way the investigators developed the investigation and how it evolved throughout the ensuing years. In order to evaluate these two different subjects, one needs to examine the similarities and differences between this investigation and theories about how investigation of this type develop, the nuances of this investigation not able to be explained by theory, investigatory elements that
Doing this, helpws protect the evidence and prevent cross contamination. The crime scene is the physical area where a crime is thought to of occurred and where the evidence of the said crime is thought to reside. Vital evidence to a case, can be found at a crime scene. This includes, fingerprints, DNA, foot prints, bullets, bullet casings, fibers, etc. It is important to determine if a crime has in fact been committed, if so, the officer must initiate enforcement action, by arresting or pursuing the offender or dispatching apprehension information.
Maintain a roster of all necessary telephone numbers How to process evidence at the scene The lead investigator must assemble an evidence processing team to collect and process evidence found at the scene. Assemble the evidence processing team. The lead investigator should organize an effective evidence processing team that includes the following experts: Bomb disposal technician. Evidence custodian.
The physical evidences are gathered at any crime scene, for example, hair, fibre, blood, fingerprints, footwear, bare-footprints, tire impressions and any fracture
Crime scene photography, sometimes referred to as forensic photography or forensic imaging, is the art of producing an accurate representation of an accident or crime scene. Crime scene photography is an important asset in the collection of evidence at the crime scene, documents the appearance and location of victims, shell casings, footprints, bloodstain patterns, and other physical evidence. In order for photographs to be admissible in a court of law, the standard for photographs of crime scenes and evidence must be of sufficient quality. Photography has a vital role in the decision made in court because the pictures are to represent the scene as it was exactly. Digital SLR single reflex camera is the most often used camera in crime scene investigations.
There is potential for a failure of the hardware involved - this may be the evidence, or even hardware in the computer forensics lab. Legal issues could arise if the opposition believe that my job was done unprofessionally or if I have been biased in favour of the prosecution[7]. Minimizing risks is essential after the identification of the potential risks. Minimizing The Risks