A meticulous account of how a LTTE death squad murdered former Prime Minister Rajiv Gandhi and the SIT’s deadly cat-and-mouse game that brought the killers to justice One month after the brutal assassination of former prime minister Rajiv Gandhi , the crack special investigation team (SIT) has managed to edge considerably closer to unravelling the complex plot behind the shocking crime that stunned the nation. A new series called ‘The Hunt: The Rajiv Gandhi Assassination ’ relives the 90-day manhunt for Sivarasan, the LTTE operative who masterminded the deadly killing of Rajiv Gandhi . But who was he, and how did he hatch the plan to kill the former PM? The assassination of Rajiv Gandhi , former prime minister of India, occurred as a result of a suicide bombing in Sriperumbudur in Tamil Nadu, India on 21 May 1991. [2] . At least 14 others, in addition to Gandhi and the assassin, were killed. [3] .