Forensic Chemistry: Indian IED Casework (Mumbai 1993, 26/11, Signature Analysis)

UGC-NET Forensic Science Unit VI advanced drill on improvised explosive device casework drawn from major Indian incidents and the forensic-investigative framework built around them. Hard-band coverage on the 12 March 1993 Mumbai serial blasts (RDX-gelatin charges concealed in vehicles and tiffin boxes across twelve sites, TADA prosecution, Yakub Memon conviction), the 26 November 2008 Mumbai attacks (Lashkar-e-Taiba's gun-and-IED hybrid operation, RDX recovered from Taj and Oberoi hotels, Pakistan-origin trace evidence), and the 14 February 1998 Coimbatore serial blasts (Al Ummah, gelatin-timer chains, thirteen detonations, TADA charges). Mecca Masjid Hyderabad 2007 and Malegaon 2008 are drilled on NIA investigative workflow, scheduled offences under the NIA Act 2008, and the forensic-chemistry challenges of secondary blast-site sampling.

Signature-analysis coverage spans Maoist/Naxal IED construction (pressure-plate victim-initiated devices, command-wire systems, ammonium-nitrate-based fill), LeT versus Indian Mujahideen versus SIMI construction differences (military-grade RDX and PETN versus locally synthesised ammonium nitrate mixtures, detonator sourcing, timer circuit type), and how examiners trace group affiliation from component, initiator and packing patterns. Institutional coverage includes the National Investigation Agency constituted under the NIA Act 2008, the NSG 51 Special Action Group for bomb disposal, and the CFSL Hyderabad explosives analysis unit.

The legal framework sub-topic covers Explosive Substances Act 1908 (Sections 3, 4 and 5), the Unlawful Activities (Prevention) Act 1967 as amended through 2019, the NIA Act 2008 scheduled-offence list, and the BNS 2023 provisions that replaced IPC terror-related clauses from 1 July 2024. Calibrated for Paper II top-decile candidates.

Topics covered:

• Mumbai 1993 serial blasts: RDX-gelatin composition, twelve sites, TADA chargesheet
• Mumbai 26/11 2008: LeT sea route, RDX hotel charges, Pakistan-origin trace, NIA Act genesis
• Coimbatore 1998: Al Ummah, gelatin-timer chains, TADA prosecution
• Mecca Masjid 2007 and Malegaon 2008: NIA workflow, scheduled offences, blast-site sampling
• Maoist/Naxal IED construction: pressure plate, command wire, AN-based fill
• LeT / IM / SIMI signature differences: composition, initiator, timer, packing traces
• Investigative bodies: NIA Act 2008, NSG 51 SAG, CFSL Hyderabad explosives unit
• Legal framework: ESA 1908, UAPA 1967, NIA Act 2008, BNS 2023

Allow 30 minutes.