Nambi Narayanan , former ISRO scientist falsely accused in the espionage case ISRO espionage case involved discredited allegations of espionage made by Indian investigation agencies in the 1990s against some scientists of the Indian Space Research Organisation (ISRO). [1] Indian intelligence agencies and the Kerala police arrested some senior aerospace engineers on charges of attempting to sell confidential documents containing designs of indigenous rocket engine developed by ISRO. [2] The ... Who is Nambi Narayanan ? Working as the in-charge of the cryogenics division at ISRO, Nambi Narayanan is claimed to have foreseen the need for liquid fuelled engines for ISRO’s future civilian space programs and introducing the technology in India as early as the 1970s — the same technology which later he was accused of selling. Nambi Narayanan was the first boy in a middle-class family, after five girls. His father was a businessman, trading in coconut kernel and fibre. His mother stayed at home to look after the children.