At the outset, the brutal murder of Bahujan Samaj Party (BSP) Tamil Nadu president K. Armstrong in July 2024 was presumed to be an act of revenge for the killing of ‘Arcot’ Suresh, an alleged gangster in north Chennai, in 2023. The months-long investigation by the Greater Chennai Police, however, has exposed a web of conspiracy involving three major gangs in the city and their thirst for dominance. This is Part 1 of a three-part series on the crime that shook the State, and is based on the 5,000-page charge sheet filed by the police in October 2024, exclusively accessed by R. Sivaraman