“Every contact leaves a trace.” Forensic biotechnology is the culmination of science and law, helping us find evidence to support legal decision-making in matters of criminal and civil law. The word forensic is derived from the Latin word forensis, meaning ‘forum’, and refers to a public, open court. Forensic biotechnology refers to the application of biotechnological methods to investigate crimes and identify evidence that can be presented in a court of law. It is a branch of forensic science that combines biology and instrumental analysis with principles of forensics for legal use. This field has revolutionised the way crimes are investigated and solved. Every piece of biological evidence tells a story using forensics and helps justice prevail. Forensic biotechnology merges biology, biotechnology, and law as it involves analysing biological materials such as blood, hair, semen, saliva, and skin cells using molecular techniques.  

 

Forensic science has its roots back in the 6th century China. Song Ci, known as the father of forensic science, wrote a book titled “Xi Yuan Lu,” which translates to “The Washing Away of Wrongs,” that helped distinguish between accidental deaths and homicides by examining wounds and determining causes of death. In Ancient Rome, methods such as analysing bloodstains and footprints were used to find suspects. As time passed, systems like anthropometry were introduced, but these were eventually replaced by fingerprinting in 1880. Fingerprint analysis resulted from the groundbreaking theory established by Henry Faulds and William James Herschel, which stated that certain regions of DNA varied greatly among individuals and could be used to create a unique genetic profile.  

 

The most significant breakthrough came with the discovery of DNA profiling (also called DNA fingerprinting and genetic fingerprinting), which uses genetic material to compare and identify with great accuracy. DNA is isolated from blood stains, semen, or hair roots and then subjected to Southern blotting and DNA hybridisation. British geneticist Sir Alec Jeffreys started working on this technique in 1977. In 1984, he and his colleagues pioneered DNA fingerprinting using restriction fragment length polymorphisms (RFLPs). In 1986, Jeffreys helped police solve a double rape and murder case using this method. Through a genetic dragnet, police found the perpetrator, Colin Pitchfork, who gave himself away after he tried asking a friend for a substitute blood sample.

 

Beyond criminal investigations, forensic biotechnology also plays a significant role in civil law, where it is used to resolve paternity disputes through accurate genetic testing. Forensic imaging technologies, such as CT scans, MRIs, and 3D facial reconstruction, have also become valuable tools. Forensic biotechnology has evolved rapidly with innovations like polymerase chain reaction (PCR), short tandem repeat (STR) analysis, mitochondrial DNA testing, and next-generation sequencing (NGS). Forensic biotechnology is an area that experiences constant breakthroughs. As the use of DNA profiling expands, ethical concerns around privacy, consent, and data storage also continue to grow, highlighting the importance of responsible use of these powerful technologies. Forensic Biotechnology has the potential to serve justice and protect the innocent, and is proof of how scientific advancements can impact society.