This blog talks about the crucial part forensic science plays in bringing accountability to our justice system.
Introduction: From Sensory Investigation to Scientific Inquiry
For centuries, crime scene investigations were limited to the senses. This meant that only immediately observable clues, like footprints and murder weapons, were solely what we had to go on. Lacking ways to accurately capture or analyse evidence, crime scene hygiene was an afterthought, with members of the public and careless investigators trampling over what today would be valuable evidence.
Modern forensic scientists still rely on the observable clues, but the invisible is what often ultimately breaks a case. Three of the most commonly used forensic techniques are DNA analysis, fingerprint matching, and forensic psychology.
The Shraddha Walkar murder case in Delhi (2022) shocked the country not only because of the brutality involved but also because of how difficult the investigation was. The victim was murdered, her body was cut into pieces, and those parts were disposed of in different areas across the city. In such a situation, a conventional investigation alone would not have been enough. The case was largely built through forensic evidence. From a forest near Mehrauli, investigators collected bone pieces; testing their genetic material confirmed who she was by comparing results with her father’s DNA. Tool mark examination on the bones indicated the use of a cleaver as the murder weapon. Fibres recovered from clothing further connected the accused, Aaftab Poonawala, to the crime. Insects present at discovery sites provided clues about when death happened, helping shape an accurate sequence of events. Behind each breakthrough stood methods rooted in scientific examination of physical evidence.
Historical and Judicial Foundations of Forensic Science in India
Although forensic science is often viewed as a modern development, its foundations in India can be traced back to ancient legal and administrative texts. References to post-mortem examinations and evidence collection can be found in the Manusmriti and the Arthashastra. Kautilya, in particular, described techniques for detecting poisoning and verifying identities, indicating an early understanding of scientific investigation.
Few realised at the time how crucial one courtroom moment would become - Kunhiraman v. Manoj (1991), heard by the Kerala High Court, introduced DNA proof into India’s legal system, fitting within the framework of the 1872 Evidence Act. Later, in a grim turn of events following the 1996 assault and killing of Priyadarshini Mattoo, biological traces found on her clothing offered silent testimony; these samples shaped the Delhi High Court’s decision in 2006 to hold Santosh Kumar Singh accountable - a ruling confirmed later by the nation’s highest bench. What began as a medical test evolved into a firm legal footing when science helped reverse a prior dismissal, showing how strongly genetic markers can point toward the truth.
Forensic Science and Criminal Investigation Process
Forensic analysis reveals how the suspect carried out the act. It assists in identifying who committed the offence and establishes what kind of crime was committed. From traces left behind, a person's involvement emerges through analysis. Evidence points directly to what occurred during the event. Timing becomes clear when clues are matched with known facts. Where things happened is confirmed by material found at the site. In time, clues point to why it happened at all.
Criminal investigation means legally searching for individuals or objects that help piece together a crime, including the mindset behind it. It is a probing from the known to the unknown, backward in time” (Weston and Lushbaugh, 2003). In India, this idea is reflected in Section 154 of the Code of Criminal Procedure, 1973, which requires the prompt registration of a First Information Report and the initiation of an investigation. Criminalistics represents the point where criminal investigation and forensic science come together. Indian criminalists apply scientific techniques to collect, preserve, examine, and interpret physical evidence. The establishment of the first Forensic Science Laboratory in Kolkata in 1952 marked a major step in institutionalising scientific investigation in India. Dr A.S. Bhattacharya, in The Role of Forensic Science in Criminal Investigation (2005), emphasised the importance of proper handling of evidence in accordance with the Indian Evidence Act.
Starting off, the officer checks if a criminal act took place. Preserving the area comes next, making sure clues stay untouched. Victims are found through witness talks or local inquiries. Suspects get taken into custody following legal procedures under CrPC Sections 157–173. Early findings often sort offences into two kinds: planned or unplanned. Cases like the 1993 Mumbai bombings show careful coordination, where forensic work tied suspects to materials used. On the other hand, sudden acts such as rural honour-related attacks lack structure. Preparation marks one type; chaos defines the other (Lyman, 2002). Visual records come from still images, audio notes, videos, and hand-drawn layouts. Mapping the site follows standard methods set by NCRB guidelines.
Institutional Challenges, Capacity Gaps, and the Way Forward
In India, policing standards differ widely - some recruits enter with minimal schooling, others join elite units such as Cyber Crime Cells. According to a 2023 NCRB document, just three out of ten probes apply forensic methods well, yet two-thirds of personnel say these tools help crack tough cases. Take the 2008 Aarushi Talwar killings: there, blood spatter examination played a key role, even amid dispute. Still, one-quarter of field agents, mostly stationed in poorly equipped countryside posts, regard scientific analysis as unnecessary, exposing weak spots in instruction. Others treat it as an extra, not a core part.
Fewer than seven central forensic science laboratories serve India's vast population, creating hurdles for law enforcement. Budget shortfalls further restrict investigative capabilities across regions. A unified DNA repository remained absent until legislation passed in 2023 introduced regulated use of genetic profiles. Training specialists through dedicated programs, such as those at Gujarat Forensic Science University, strengthens practical outcomes in criminal inquiries. Judicial oversight emerged clearly in the 2010 ruling on narco-analysis, where safeguards rooted in Article 20(3) were affirmed.
Science used in criminal cases offers strong support during investigations. Knowledge matters just as much as technology - experienced officers, skilled analysts, and sharp judgment shape outcomes. A ruling in State of Maharashtra v. Suresh (2000) underlined this point clearly. The highest court confirmed that without forensic input, fairness in trial processes weakens. Platt noted back in 2003 how human insight guides technical methods effectively.
Science helps solve crimes by analysing physical clues found at scenes. Because evidence is examined carefully, investigations become more accurate. When details matter, results often lead closer to the truth. Since methods improve over time, justice systems adapt accordingly. As cases grow complex, experts rely on tested procedures. Though challenges exist, progress continues steadily forward.
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