Indian Forensic Laboratories: CFSL, SFSL, RFSL Map

The Directorate of Forensic Science Services sits in the Ministry of Home Affairs in New Delhi. It was founded in 2003 to consolidate what had been a scattered set of laboratories run by different parts of the central government. Before 2003, the CFSL at Kolkata was under the Intelligence Bureau, the CFSL at New Delhi was under the CBI, and the GEQD (Government Examiner of Questioned Documents) offices reported to yet another wing. DFSS pulled all of them under one umbrella and gave them a common SOP framework.

DFSS does four things in practice. It runs the seven CFSLs as central facilities. It runs the three Government Examiners of Questioned Documents offices at Shimla, Kolkata and Hyderabad. It issues the national-level forensic SOPs that the state SFSLs are expected to align with. And it coordinates with NFSU on training, accreditation and the National Forensic Information System (NaFIS). It does not control the state SFSLs directly; those report to their respective state home departments.

The two annual reports worth keeping current with are the Crime in India volume from NCRB and the Annual Report of DFSS. They give you backlog numbers, evidence-class distribution, and the impact of BNSS 176(3) on intake. The statutory basis for that intake change is laid out in BNSS 2023: Investigation, FIR, Search and Seizure, and the foundational definitions sit in Forensic Science: Principles, History and Ethics.

There are exactly seven Central Forensic Science Laboratories as of 2026. Each has a primary specialisation that gets quoted in textbooks, though in practice they all run a full general-evidence portfolio. The Hyderabad lab has, since the late 2010s, been the de-facto flagship for cyber forensics, narcotics, and DNA.

The first four CFSLs (Hyderabad, Kolkata, Chandigarh, Delhi) form the legacy set established by the late 1960s. The latter three (Pune, Bhopal, Guwahati) are the 2010 regional expansion. Four CFSLs were operational before 2010.

All seven CFSLs are NABL-accredited for at least their core divisions, though scope-of-accreditation varies. NABL accreditation under ISO/IEC 17025 is increasingly demanded by Indian courts before expert opinion is admitted, particularly after a series of 2018 to 2022 High Court observations on lab quality.

A State Forensic Science Laboratory is the workhorse of Indian forensic practice. There are now thirty-three-plus SFSLs across the states and union territories (every state has one, the larger UTs have one, and a few states have more than one after recent restructuring). Each SFSL reports to its state's Home Department or Police Department, not to DFSS.

The internal structure is fairly uniform across states, even though the names of divisions vary.

1. Director / Joint Director
   Apex of the lab. Usually a senior scientist or a senior IPS officer on deputation. Signs off on contentious reports and represents the lab in High Court appearances.
2. Biology and Serology Division
   Body fluids, hair, fibres, botanical traces. The DNA sub-unit (PCR-STR, sometimes Y-STR and mtDNA) usually sits inside this division.
3. Chemistry and Toxicology Division
   Narcotics under the NDPS Act, illicit liquor, food adulteration, poisons. GC-MS, FTIR and HPLC are the standard instruments.
4. Physics and Ballistics Division
   Firearms, tool marks, restoration of erased numbers, glass and paint fractography. Comparison microscopes and stereo microscopes dominate the floor.
5. Documents Division
   Handwriting, signature comparison, ink dating, indented writing recovery (ESDA), counterfeit currency. The traditional 'QD' shop.
6. Cyber and Audio-Video Division
   The newest division at most SFSLs. Mobile-phone extraction (Cellebrite, XRY), disk imaging, audio authentication, deepfake screening. Backlogs here are among the worst in the country.
7. Photography and Scene-of-Crime Division
   Crime scene team that goes out on call. Carries DSLR, ALS, fingerprint kits, the Mobile Forensic Van where one is funded. Post-BNSS 176(3) this division has tripled in workload at most states.

The jurisdiction rule: an SFSL handles cases investigated by the state police of that state. A CFSL handles cases investigated by central agencies (CBI, NIA, ED, NCB) or state-police cases that the central government has transferred. There is no formal hierarchy between an SFSL and a CFSL. A state IO cannot "appeal" an SFSL report to a CFSL; the two labs serve different agencies. The only path is a re-examination ordered by the trial court, which can route the second analysis to a CFSL, a different SFSL, or NFSU.

For routing on intake, see the worked example below.

Below the SFSL, most large states run a network of Regional Forensic Science Laboratories at the district or zonal level. Uttar Pradesh runs ten-plus, Maharashtra eight, Tamil Nadu seven, Karnataka five, and so on. The RFSL is where the everyday narcotics, dowry-death viscera, and routine document cases actually get done.

The functional split between SFSL and RFSL varies by state but the working rule is:

• RFSL handles routine cases that do not require specialist instrumentation: visual blood ID, alcohol level in viscera, gross opium and ganja identification, basic handwriting comparison, ballistic class-character work.
• SFSL handles anything requiring DNA, GC-MS quantification, FTIR, comparison microscopy at the individual level, or cyber forensics. Also any case where the report will be central in a Sessions Court trial.
• CFSL handles anything investigated by a central agency or transferred to one, plus inter-state and high-profile cases.

The reason the RFSL tier exists is geography. India's largest states are bigger than most European countries, and a beat constable in Bastar cannot drive eight hours each way to deposit a packet of ganja at the SFSL Raipur. An RFSL at the district level keeps turnaround under two weeks for routine work. Without it, the SFSL backlog would be unmanageable.

Two national-level institutions sit outside the CFSL-SFSL-RFSL grid and are worth their own block in any answer.

NFSU, Gandhinagar (2020). The National Forensic Sciences University was established by an Act of Parliament in 2020, upgrading what was previously the Gujarat Forensic Sciences University (GFSU, 2009). It is a deemed-to-be university under the Ministry of Home Affairs and runs MSc, MTech, MA, PhD and short-course programmes across forensic science, cyber forensics, criminology, behavioural science and forensic psychology. NFSU also runs a satellite campus at Delhi and is expanding regional campuses (Goa, Tripura, Manipur, Pune, Bhopal, Dharwad). For the FACT entrance, NFSU is the gateway university.

CDFD, Hyderabad (1995). The Centre for DNA Fingerprinting and Diagnostics is a Department of Biotechnology autonomous institute, set up by Lalji Singh in 1995. Singh is regarded as the father of Indian DNA fingerprinting. CDFD handles disputed paternity, inheritance, identification in mass disasters (the 2004 tsunami, the 2013 Uttarakhand floods, the 2021 Joshimath ice-burst), and increasingly the DNA work for high-profile criminal cases referred by courts. CDFD also runs the Indian DNA database research and the BTISnet bioinformatics infrastructure.

The institutional difference that gets tested. NFSU teaches and certifies. CDFD does specialist DNA work. The seven CFSLs and the SFSL/RFSL grid do operational forensic casework. The four functions are distinct; mixing them up loses marks.

For the international counterparts (Interpol DVI, ENFSI, FBI Lab, AAFS) and how India coordinates with them, see Crime Scene Management: National and International.

The Bharatiya Nagarik Suraksha Sanhita came into force on 1 July 2024 and reshaped how labs interact with field investigation. Three provisions matter directly for the institutional map.

• Section 176(3) makes FSL visits compulsory for offences punishable with imprisonment of seven years or more. The lab is no longer a downstream recipient of evidence; it is a co-investigator at the scene. State governments are required to set up Mobile Forensic Vans to support this.
• Section 105 codifies videography of search and seizure. SFSL and RFSL photography divisions now also handle search-video certification.
• Section 173 sets a 90-day window for the chargesheet, which has a knock-on effect on FSL turnaround. State labs are under explicit pressure to deliver reports inside 60 days for serious-offence cases.

The names of the seven CFSLs, the founding years of DFSS (2003) and NFSU (2020), and the operational meaning of Section 176(3) are all integral to any account of how Indian forensic evidence reaches court.