Gangtok, Aug. 1 -- KCN is a highly toxic and rapidly fatal substance. It is a chemical asphyxiant that interferes with the body's ability to use oxygen. Ingesting even a small amount can be lethal. Due to its extreme toxicity and swift effects, its taste has not been reliably documented in a clinical setting.

M.P. Prasad, from Ernakulam, was a man whose life had unraveled due to financial hardship and deceit. After being swindled by con artists from Rajasthan, he found himself burdened with debt and despair. On June 17, 2006, in a hotel room in Palakkad, Prasad decided to end his life. His suicide note, however, became more than just a farewell-it became a historical document.

In a poignant section of the note addressed to doctors, Pras...