Detection Of Fire Accelerants Fires can be set in a number of ways. Setting a fire does not require the use of an accelerant, but it frequently exists in arson and accidents as well. Its important to note, flammable liquids and accelerants are also not always one and the same and can vary in type. The vapor from accelerants such as a flammable liquid supports the flame over the material, which can be either easy or very difficult to detect. The accelerant can leave visible physical traces, or the trace of the chemical property is left behind. It is then the chemists’ responsibility to identify what the accelerant is before it can be positively identified as probative in the fire. During a fire investigation, the method of discovering the …show more content…
This allows chemists to obtain the compounds from the sample material for identification by matching results for the presence of an accelerant or its remnants. Samples of the accelerant residue signify the nature of the fire considerably if it is inexplicable based on the location where it was gathered. Questionable substances may be the explanation when suggesting the source and cause of the fire. In any case, until labs can verify the identity of the residue, it is unclear what role it plays in a fire scenario (Icove&DeHaan, p. 560-562). There is no doubt that accelerant detection is a valuable tool in forensic fire investigation. It’s important to note that both techniques require a high level of training and accuracy. Samples of residue and debris must be handled with great care during the investigation and packaging for delivery to lab technicians. It’s easy to distinguish accelerant dogs and accelerant sensors but their obvious differences end there. Biology is truly an amazing alternative to technology, and is a valued method in the field of forensic fire investigation including many others. I was truly amazed to learn how the field of criminal justice can take advantage of evolution and benefit from it through training. Simply put, when technology fails, you can trust a dog’s sense to do what it is biologically capable of. Accelerant detection methods are a valuable tool in fire scene
The Homicide unit assisted both the investigators and the Forensic Identification unit to gather enough evidence to determine what happened at the crime scene (Huff Post News, 2013). The Forensic identification unit assisted the investigators in determining if the remains that were found in the incinerator, was in fact of Tim Bosma. The forensic scientists evaluated a tooth that they had found, to see if they could gather enough DNA from it to positively identify the human (Adam Carter,
I t has been 145 years since one of today’s biggest cities was burned to the ground. One normal day in the city of Chicago, a fire started in the O’ Leary’s barn on October 8th, 1871. There was dry weather and most of the city was made from wood. With the wood, and the dry, windy weather, the city was very flammable. Once the fire started, it spread to the whole city.
On 11-14-2015 at about 2106 hours I was dispatched to a domestic violence report at the Emerald Point Condos at 31900 104th AVE SE; H102, Auburn/King/Wa. Enroute dispatch advised the reporting party/victim, Lizbeth Nunez Santana was calling to report that she was assaulted by her husband. The incident occurred about two hours prior and the husband was no longer at the residence. I arrived at the address and contacted Lizbeth and her cousin, Maribel Chavez. Throughout my conversation with Lizbeth it was clear that she was very upset, she had to stop speaking several times as she was crying and upset with the situation.
A flamethrower is a device designed to project flames and massive clouds of smoke in a controlled manner during wars. It was mostly used in battlefields, fortifications, bunkers and any other closed or shielding location. It was used because it can jet out flames up to 20 yards away from where the person controlling it is standing. It was also created to be carried and used by a single soldier. The device was first used on February 26, 1915 by the German 3rd pioneer regiment.
The arson evidence relates to the car crash and how the car was burned to hide the evidence. The evidence from the bite mark cleared up my client, John’s story who stated he was in a bar fight the night prior to when being questioned. The use of blood spatter helped investigators determine where the victim was killed in the cabin and how many possible killers there were. Blood detection helped discover what killed the
The affidavit explains, “when officers arrived to the crash scene at about 1:40 a.m., there were flames extending 30 feet into the air,
Chemical compounds that are available to determine are CaCO3, CaCl2, Ca(NO3)2, mgCl2, MgSO4, KCl, HCl, HC2H3O2, KNO3, K2SO4, NaC2H3O2, Na2CO3, NaCl, Na2SO4, HNO3, H2SO4, HNO3, H2SO4, NH4Cl, (NH4)2SO4, K2CO3, 0.1 M AgNO3, 0.2 M BaCl, Mg(s), NaOH, and KOH. To start this experiment, start with the flame test by gathering a Bunsen burner and a Nichrome wire. Connect the Bunsen burner with a rubber tube to a laboratory gas. To prepare solutions for the flame test, weigh out 0.205 gram of Unknown Compound using an analytical balance and mixed it into a 140 mL beaker filled with 20 mL ionized water. Ensure that solid is completely dissolved using a stirring rod.
The two story traditional Victorian house exploded and engulfed in flames to eliminate evidence. After the charred bodies were recovered from the fire, tissue samples were obtained to identify each victim, using DNA, which is the molecule responsible for transmitting all hereditary information passed on from one generation to the next (Johll pg. 409, 2007). To determine the cause of death, an autopsy was performed and tissue samples from each victim. Among the evidence recovered after the fire was a single syringe, which was fully intact and sent for analysis.
A positive aspect of this is that forensic scientists only need a small amount of a sample to get the results they need (“Forensic Science” 12). These samples can come from many other forms of identification other than fingerprints and bloodstains. A few moderate examples include strands of hair, tiny beads of sweat, and a saliva specimen (“Forensic Science” 12). Forensic Science Technicians stated that “crime scene investigators may use tweezers, black lights, and specialized kits to identify and collect evidence.” They also stated that examining autopsies prove to be beneficial in a crime investigation (“Forensic Science Technicians”
I greatly respect the work that our Fire Department volunteers do for our town, it is important to keep our community safe. The commissioners serve the community and the volunteers who help our Fire Department run. The volunteers help to keep our taxes low and as commissioners it is our job to encourage increases of the number of our volunteers and provide the necessary training and tools for our firefighters and volunteers to keep residents
To Build a Fire During the story “To Build a Fire” the theme that is developed is that sometimes you have to trust animals instincts because they might know more about the fire than you do. The setting of the story is on the Yukon Trail and it is seventy five degrees below zero while the man and the dog are on the trail. The reason they are on the trail is because the man is trying to find the camp to get food, water, and shelter. There are two ways the theme is developed. One way that the theme is developed is that the man made a fire to keep him warm, but later the man wanted to continue on the trail to try and find the camp.
They also analyze the chemical and dye on the fiber. Simply stated, forensic scientist has the ability to know the type of fiber, where it came from, what sort of fabric it was made into and the manufacturer with the help of modern
This can be used for legal purposes. This type of testing can be used to identify catastrophe victim (these are people who die in accidents or disasters that can not physically be identified), identify crime victims, rule out (find innocent) or implicate (find guilty) crime
The physical evidences are gathered at any crime scene, for example, hair, fibre, blood, fingerprints, footwear, bare-footprints, tire impressions and any fracture
Fires are grouped into different classes and so require the right extinguisher for that class. Class A: SOLIDS such as paper, wood, plastic etc Class B: FLAMMABLE LIQUIDS such as paraffin, petrol, oil etc Class C: FLAMMABLE GASES such as propane, butane, methane etc Class D: METALS such as aluminium, magnesium, titanium etc Class E: Fires involving ELECTRICAL APPARATUS Class F: Cooking OIL & FAT etc ,mn Foam Fire Extinguishers: These Used for Classes A & B fires. Foam spray extinguishers are not recommended for fires involving electricity, but are safer than water if incorrectly used on electrical