Last month, Atiq Ahmed, one of India's most dreaded gangster-politicians, was shot dead live on TV along with his brother. The grisly murder marked the end of his four-decade-long reign of terror in Prayagraj, a city once known for its rich culture. Soutik Biswas in New Delhi and Vikas Pandey in Prayagraj piece together Ahmed's tumultuous life, in which the boundaries between crime and politics became blurred.