This article explains how soil is made out of eroded rock, air, water, bacteria, and organic matter. It explains how every soil sample has unique characteristics and can be used to identify the location of origin. The article also gives an example where a murder happened and the suspect simply thought that he could not have the crime traced back to him because his assumption was that “dirt was dirt.” The soil samples the police took from the suspect’s boots were examined in close detail. The results showed that the soil on the boots were from the crime scene, causing the suspect to confess to the crime and was convicted.
This article goes into detail how soil particles that were found in a used handkerchief were used to identify the murderer of a strangled seamstress. The handkerchief contained particles of coal, snuff, and mineral grains. The police identified a man who they believed to be the murderer. They took samples of soil found on his clothes and under his fingernails and found the exact same particles of coal and minerals in the samples. The suspect was also known for using snuff which then gave the investigator working on the case enough evidence to confront the suspect. The suspect then confessed to the crime.
This article explains how the UK is one of the leaders in geological forensics. It also explains how geological forensics is used frequently and is sometimes essential to a criminal investigation. One of the main points that this article brings up is that soil is not exactly like DNA. DNA is something that is very exact and points to only one person. Soil, while specific to certain areas, can also appear in other areas too, meaning that it is similar for a sample that came from one location could be dissimilar to the rest of the soil in that area. There are many different parts to soil, such as bits of vegetation and microbes that can be used to identify the soil, however once again, there is still the possibility that the sample could be dissimilar.
This infographic gives details on a case involving the murder of a mother and son and how soil found on a the suspect’s shovel gave the location as to where the bodies were hidden. The suspect refused to say anything or give away the location of the victims so the investigation team had to analyze soil on the suspect’s shovel to find the location of the victims. This narrowed down the search, meaning that the investigators did not have to cover such a large area to find the bodies. The soil that was examined urged the investigation team to search a nearby industrial quarry, where the victims were ultimately found. The suspect later confessed and was convicted.
This article explains how many forensic techniques were inspired by the fictional writings of Sir Arthur Conan Doyle’s Sherlock Holmes and the methods of investigation portrayed in the writings. It also gives insight to the history of how soil was implemented into modern criminal investigations. The article also gives a specific example of how soil was used to solve a murder of a woman’s husband (who turned out to be murdered by the wife) and how soil from where the body was found was also found on the wife’s clothes. It turned out that bentonite was specific to the lake where the body was found and that is what was used to determine the woman’s guilt.
This article explains how identifying soil is based on analyzing chemicals and biological material found in the samples and how each soil is different. It also talked about how bacteria in the soil can be cultured in a lab to help identify its origin. X-ray diffraction is a process that can be used to create a soil profile and compare it to existing data on soil. Soil can also be traced to different locations using chemicals. This source could be used in the classroom by teachers educating students about how soil is used in forensics.
This article explains how soil can be identified using geology and geochemistry. It also acknowledges the fact that the many aspects of soil are unique to a certain location and where it comes from. The color of the soil, for example, can determine the history of that soil and the compounds present. If a soil is black in color, it means that there is a large amount of organic material in it while lighter colored soils usually contain more sediment. This article also explains how any natural or artificial particles found in the soil are considered part of the soil and how soil is dried before testing. The last thing that the article explains is how ground-penetrating radar technology is used for identifying soil structure.
This article explains how soil is an essential part of forensic science and how it is used to identify criminals based on soil samples found on or with a suspect. It makes an analogy about how, like fingerprints, soil can be used to identify specific locations of where a soil sample may have come from. The article also explains the different aspects of what can be found in soil to identify it. This could be the sediment in the soil, the color of the soil, and the structure of the soil. It also talks about how a soil sample from an indoor environment is collected with a vacuum and samples from an outdoor environment are collected with plastic vials. The last thing that this article explains is that if biological material is found in a soil sample, the whole sample must be collected and sent to a lab.