Kochi, Jan 22 (ANI): Senior Bharatiya Janata Party (BJP) leader Subramanian Swamy on Friday stated that Congress MP Shashi Tharoor's wife Sunanda Pushkar's died "due to poison". He added that she died due to an overdose of anti-anxiety drug, Alprax, which if given in high dose, causes heart failure. He further said that Tharoor statement to the police was contradictory, which shows that he is hiding something, and now he has become the prime suspect in the investigation.