Forensic serology is the study and detection of bodily fluids.

• A. The examination of handwriting
• B. The analysis of soil samples
• C. The study of trace metals
• D. The study and detection of bodily fluids

Answer: (D)

At the heart of this item is understanding what forensic serology does. Forensic serology focuses on identifying and detecting bodily fluids at crime scenes to help establish what happened and how people and events are connected. The option that states it as the study and detection of bodily fluids aligns exactly with what serology aims to do, covering fluids such as blood, semen, saliva, urine, and other secretions. In practice, scientists use initial presumptive tests to indicate the possible presence of a fluid, followed by confirmatory tests to verify what the fluid is, and sometimes to help recover DNA from it for identification and profiling. The other areas described involve different branches of forensic science: handwriting analysis examines writing and ink to determine authorship or authenticity; soil analysis looks at the composition of soil from a scene; and the study of trace metals deals with detecting and characterizing metal elements. These disciplines don’t target bodily fluids, which is the essence of forensic serology.