Academic level – Undergraduate 3-4
Type of paper – Informative Essay
Topic Title – Trace Evidence
Explain to your CSI partner in training the methods of finding trace evidence, cautions on not losing or destroying it, and collection methods.
Relate to your partner the components of human hair that are considered class characteristics.
Further, explain how the Locard Principle plays a major part in the transfer of trace evidence and the importance of identifying and collecting it for the investigation.
Trace evidence can help identify the source of a sample and the date of the material’s creation to limit potential suspects in a case. Though many other substances can serve as trace evidence, glass, paint, fibers, and hair are the most frequently examined. A thorough investigation of the materials can provide details about the sample origin and how it contributes to the storyline.
Trace evidence detection requires exacting methods, including visual observation, microscopy, tape lifting, and vacuuming. Forensic analysts use procedures to evaluate, discover, categorize, and compare trace evidence components (Dipale, 2020). Visual observation detects visible materials, microscopy magnifies small objects for closer inspection, and tape lifting and vacuuming gather particles from surfaces and locations. If trace evidence is appropriately recognized, gathered, kept, and submitted for examination, it can provide crucial information in the investigation of the incident and enable the connection between the crime scene, suspect, and victim (Dipale, 2020). For reliable evidence in court cases, CSIs adhere to stringent standards and employ clean instruments, protected equipment, airtight packing, and recorded processes.
The class attributes of human hair, including color, texture, and length, aid in reducing probable matches, even if they are unnecessary for identifying a specific person. Examination is usually based on Edmond Locard’s exchange which asserts that whenever two items come into touch, there is an exchange of information.. According to the Locard principle, the forensics department must assist in enforcing the law, which still plays a crucial part in locating the true violators (Balakrishnan, 2020). Trace evidence found at crime scenes can give law enforcement significant leads, such as identifying a suspect and demonstrating clear connections between the suspect and the crime.
Carefully examining the materials can provide information about a sample’s origin and role in a story. CSIs can provide critical insights due to accurate gathering, preservation, familiarity with class characteristics, and the Locard Principle. Effective crime reconstruction and case resolution are improved by precise trace evidence identification and gathering.
Balakrishnan, C. (2020, September 10). Principle of exchange and its relevancy in criminal. Indian Law Portal. https://indianlawportal.co.in/principle-of-exchange-and-its-relevancy-in-criminal/
Dipale, A. (2020, December 24). Trace evidence in forensic science. Legal Desire Media and Insights. https://legaldesire.com/trace-evidence-in-forensic-science/#:~:text=Various%20methods%20are%20used%20for,searches%20along%20with%20magnifying%20glass.