Was Lal Bahadur Shastri Assassinated? By whom?

Lal Bahadur Shastri was the Prime Minister who almost led India to a victory, when he had to go to Tashkent to talk of truce with Pakistan.    We have discussed it earlier in our blog post “The Betrayal of Tashkent in 1965 [http://www.patheos.com/blogs/drishtikone/betrayal-tashkent-1965/]“.  Here