[4][10] Pottu Amman was recalled to Jaffna, and in October 1987, when war had erupted between the LTTE and the Indian Peace Keeping Force (IPKF), he was sent to Tamil Nadu to co-ordinate the flow of supplies from India to Sri Lanka.

[5][11] Following the IPKF's withdrawal in March 1990 and under Pottu Amman's leadership, TOSIS expanded greatly and became a formidable organisation, copying the tactics of Inter-Services Intelligence, Mossad and Shin Bet.

[5][12] As chief of TOSIS, Pottu Amman is believed to have masterminded the assassinations of Rajiv Gandhi, Ranasinghe Premadasa, Ranjan Wijeratne, Clancy Fernando and many others.

[1] In March 2008 Prabhakaran, Pottu Amman and four other LTTE members were charged with the assassination of Foreign Minister Lakshman Kadirgamar in August 2005.

[13] What happened to Pottu Amman, like many senior LTTE members in the final stages of the Sri Lankan civil war in 2009, remains shrouded in mystery and is prone to wild speculations and rumours.

Officially, Pottu Amman was killed in the early hours of 18 May 2009 as he, Colonel Letchumanan and other LTTE cadres tried to cross the Nanthi Kadal lagoon in a boat and were fired upon by Sri Lankan soldiers.

[16] In September 2009, Deputy Solicitor-General Kapila Waidyaratne informed the Colombo High Court that Prabhakaran and Pottu Amman had been killed in May 2009 in Karaithuraipatru and that their names should be removed from those charged with Kadirgamar's assassination.

[17] In October 2010 the charges against Prabhakaran and Pottu Amman in relation to the assassination of Rajiv Gandhi were dropped after the Central Bureau of Investigation filed a report stating that the pair were dead.

[19] Some have theorised that Pottu Amman escaped whilst others claim that he was captured by the Sri Lankan military and was being held captive in a secret location.

[14][20] The Sri Lankan military dismissed the reports, saying that, although they hadn't found his body, they knew that Pottu Amman had been killed in the final stages of the civil war.