Forensic serology is the detection, identification, classification, and study of various bodily fluids, including blood, semen, saliva, and urine, and their relationship to a crime scene, with forensic serologists also involved in DNA analysis and bloodstain pattern analysis. Serology and DNA analysis are closely aligned: serology identifies what type of fluid is present, while DNA analysis matches those fluids to a specific individual, two steps that are typically handled by the same forensic team and taught as a single discipline.
If you watch popular TV detective series or read crime novels, you might think that the smoking gun or carelessly left fingerprint from an ungloved hand are the keys to solving all kinds of crime mysteries. In reality, there’s another branch of forensic investigation that’s at the heart of crime-solving: forensic serology. When combined with the science of DNA analysis, forensic serology often provides the indisputable piece of evidence that places a suspect at the scene of a crime and ultimately puts them behind bars.
Forensic Serology can be a detective’s best friend and a criminal’s worst enemy — and as the science behind it advances at breakneck speed, it’s hard to imagine any limitation to the secrets it can reveal in time. It is the hard science behind thousands of real-life cold cases finally being solved.
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