1) What are some of the fire anomalies an arson investigator will look for during an investigation? A fire investigator will first ensure that the fire did not have an accidental cause, by searching for clues like faulty wiring, cigarette smoking and overheated electric motors. Then the investigator will begin an extensive on-site investigation by first looking for containers that are capable of holding an accelerant, as well as an ignition device such as a candle. The investigator will also looking for irregularly shaped patterns on the floor, which would be caused by the accelerant. Finally, the accelerant will search for signs of breaking and entering and theft. 2) A piece of carpeting collected at the scene of a suspected arson is sent to the lab in an evidence collection can. Explain the methods that can be used to extract any volatile components that may be trapped in the carpet fibers? The methods that will be used for extracting volatile components include using a “sniffer.” The “sniffer,” otherwise known as a portable vapor detector, sucks in the air surrounding the questio...
Forensic Science Introduction: Someone in a restaurant has suddenly fallen ill and a mystery powder has been discovered with the victim. As the chief investigator, your duty is to identify the mystery substance through a lab. In this lab, it will consist of five known compounds and one unknown compound. Your job is to distinguish which one out of the five substances is the mystery powder. To figure out the mystery matter you will have to compare their physical and chemical properties and match them with the appropriate compound.
The first step of a comprehensive incendiary investigation is fire scene investigation. In the Tight Shoe Inc. report this is shown in the background information, property description, type of incident, fire cause, incendiary device description, evidence, photographs, property, and documentary evidence. This step reflects the work done and collected at the fire scene. The next step is assessment of investigative needs which is shown in the Tight Shoe Inc. report under motive and interviewing firefighters and other first responders. This step is usually done on the scene of the fire or right after. The following step is formulation and evaluation of a strategy which is shown in the Tight Shoe Inc. report under prosecution reports, obtaining search warrants and arson laboratory report. The next step of implementation of strategic plan is shown under insurance and potential criminal violations. The final step of the process is presentation of formal investigation is shown under summation of the investigation.
Evidence analysis and ranging is the most crucial stage of investigation. The success of the case exposure lies in the gradual evidence research and collecting prior to the laboratory analysis. The CSI systematically makes his way through the crime scene collects all potential evidence, tagging, logging and packaging so it remains intact on its way to the lab. Depending on the task breakdown of the CSI unit he may or may not analyze the evidence in the lab.
“Learning basic investigative techniques will make you better at your job and increase your marketability to other firms. It’s also a lot of fun. Your next accident photo or witness interview might be the factor that wins the case.” (Bevans, 2004).
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.
The most important thing to remember when called to a crime scene is that no situation is textbook. Guidelines may be in place to help investigators get started, but the methods of securing and processing will vary by crime scene. Outside factors may make it hazardous for investigators to do their job – inclement weather, safety hazards such as a downed power line, fire hazards, etc. These factors will dictate how investigators approach the scene, so they must remember to be adaptable and willing to compromise when needed. They may also have to wait until the scene is safe to approach before examining it.
The Great Chicago Fire started on October 8th, 1871 and is said to be one of the biggest events in Chicago’s history. To this day, nobody really knows how the fire was started; however, most say it started in a barn behind the home of Patrick and Catherine O’Leary. There are claims that their cow was the cause, but that’s just one of the many myths that were started. The way that most of the buildings were built during this time, it was only a matter of time before a major fire happened. With all the catastrophic events that took place during the fire, there were also many great effects that occurred after the fire was over and the reconstruction process began.
Lyman, D. Michael; Criminal Investigation, The Art and Science; 3rd edition, 2002 Prentice Hall. Pgs. 188-200.
Yes I believed that arson dogs come up with better results than a chemical sniffer, They have good noses, and an arson dog is capable of detecting trace amounts of materials which would be almost impossible to find using other means. Dog when train properly they can sniff out anything, These are dogs specially trained to detect very small quantities of hydrocarbon ignitable liquid vapors Gaensslen, R.E., & Larsen, K. (2013);but there can be a situation where it can derail the dog from sniffing out arson chemicals. For once preventing arson dog findings to be entered into court can be a con for the accelerants are exposed to air they begin to fade and evaporate and a dog could be too late in smelling it, which can be a big problem, another
Denise Moore 's criminal report starts the investigation. A police investigation of a crime is the entryway into the criminal justice system, once Denise Moore reported the crime, Detective Riley and Detective Clay conducted a photo lineup, an investigative tool used when the suspect is unknown and not in custody, to identify the suspect (Burns, 194).
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.
Crime scene investigators work for law enforcement agencies or other criminal justice fields that utilize trained investigators. They collect, identify, classify and analyze physical evidence to help solve and prosecute criminal activity. A crime scene investigator may test weapons, clothing, hair and tissue for criminal evidence. Once they collect all the evidence, they have to write reports detailing evidence collection procedures and conclusions, which is part of their responsibility. According to Bureau of Labor Statistics, the majority of crime scene investigator work with local and state government agencies, including in crime labs, Medical examiner offices and Law enforcement agencies. The duties for crime scene investigator is to secure
A: The film begins with a fire. It narrates the story of men running from a fire when, suddenly, one of the men stop and sets fire to the ground in front of him and the steps into the new safety zone he had just created. The term for his discovery became known as an escape fire. The directors used the idea of an escape fire as a metaphor for our health care system. Currently, our health care system is like a raging fire. The consuming flames of rising costs and a “disease maintenance” mind-set are about to consume our country and we must find a way out, an escape fire, before we perish. Like the men running away from the eminent death by the flames, we as a nation are sprinting towards
When a suspect’s weapon is examined in the lab, it will be test fired into a box filled with cotton or a tank of water to provide the examiner with the bullets and cartridges with a known history. Using a microscope, the known cartridges are compared with the ones in question. With some patience, skill, and a little luck, experts can definitively say that a certain firearm and no other fired this bullet, or ejected this cartridge.
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.