This blog is a collection of student comments on the concepts and questions that they are examining as they are introduced to forensic science.
Saturday, September 6, 2008
Lauren's Death's Acre Essay
Alex's Death's Acre Essay
Over the years, Bill Bass and his colleagues had developed and perfected numerous techniques to aid them in forensic dilemmas. In one case, Bill Bass and his team were requested to aid in the identification of a cremated corpse. Bill Bass could not confirm whether the ashes were even human. Bill had the ashes sent to a commercial lab where they went through a spectrographic test, “ICP-OES.” During the procedure the ashes were burned at ~18,000 degrees Fahrenheit, while the spectrograph captured the wavelengths of light emitted from the material. This chemical “fingerprint” was then matched to known elements, particularly silicon. The test revealed that the ashes contained nearly five times the amount of silicon normally found in cremated corpses, proving the ashes were not human. Instead they were actually composed of concrete and powdered limestone. Technology has come a long way to aid forensic science thanks to Bill Bass and his development of the Body Farm.
This is a fantastic novel not just because it shows how fascinating and important forensics is, but also because of how much this particular field has developed thanks to the important contributions of Dr. Bill Bass and his Body Farm.
Friday, September 5, 2008
Thomas' Death's Acre Essay
In this book, Dr. Bill Bass, takes the reader through his interesting life as a forensic anthropologist, and how he came to form the Body Farm, while he was teaching at the University of Tennessee. Beginning as an undergraduate, Dr. Bass grew a great interest in anthropology, and developed close relationships with his teachers and mentors. One of his first experiences with this type of work, was with one of his teachers, while examining a car crash victim’s body, and identifying whose it was. This sparked an immediate interest that would lead Bill Bass towards his new life journey. Another one of his cases was re-examining the Lindbergh child’s bones, at the request of the widow of the accused kidnapper. This was interesting how easily he was able to extract clues and other information such as age, so quickly, as he confirmed the child’s age at 20 months. Even more intriguing was how Dr. Bass, taught his students to identify the sex, race, age, and stature of the remains in order to set a good basis for further investigation. He was able to determine all of this from a femur, and a skull with a jaw. Based on his observations of the shape and other characteristics of the skull, as well as the length of the femur, Bass was able to conclude that this murder victim was a black woman, about 5 foot six, in her early thirties. With this information police were able to conclude that these remains were Mary Louise Downing’s, who was reported missing in the area. Although Dr. Bass deals with corpses in such a routine and ordinary manner, he does hold great respect for the bodies he works on, and even thinks about Mary Louise often, for he now uses her skull, everywhere he teaches as a precedent, to show others how to solve murder puzzles elsewhere in the world. It was moments like these, along with his passion for his work, that made him continue his career, and expand his field at the University of Tennessee, and later create the humble beginnings of the worlds only Anthropology Research Facility, Death’s Acre.
Christie's Death's Acre Essay
Death’s Acre is narrated by Dr. Bill Bass, as he tells how he worked his way up to eventually become the
The four things that one must identify, as Dr. Bass explains, are sex, race, age, and stature. This can help narrow down the possibilities when identifying a body. There are many techniques used to identify these, for example the pubic bone, as well as the teeth, can help determine age. How fused the joints are in the cranium is also an indicator of age. By using a body’s teeth, dental records can be matched to them, and the body can be identified more quickly. Another interesting fact is that in a fire, arms and legs flex because water evaporates and muscles and tendons shrink. If a burned body is not found in this position, it is an indication that the person was tied up when they were killed. Insects can also give clues to what happened to a victim. If a person has been stabbed, the flies lay their eggs there because they are attracted to the blood. If there are injuries, such as stab wounds, to a body, the body will be more decayed in areas other than the face, which has moist crevices the insects are also attracted to. A very interesting way to obtain fingerprints was also described, by fuming the body with superglue, and then dusting with ultraviolet powder.
Thursday, September 4, 2008
Morgan's Death's Acre Essay
Finally, Dr. Bass also goes into detail about the four major stages of human decomposition. The body goes through the fresh stage, the bloated stage, the decay stage, and the dry stage. In the fresh stage hair and skin begin to decompose, along with the teeth. During the bloated stage bacteria begin to consume the stomach and intestines. The abdomen will begin to bloat due to the release of waste gases from microbes. In the decay stage hair and skin continue to disintegrate and most of the bones become exposed. Finally, in the dry stage any remaining skin dries out and shrivels, similarly to fallen leaves. This is an important note because the dried skin could often be confused for leaf litter at a crime scene.
Through Dr. Bill Bass’s intricate description of forensic science, I have come to realize how important every detail is. To successfully solve a crime, no matter how simplistic it may appear, it is imperative to take each detail into account.