"It has been a shoddy investigation on the part of the police. There have been many errors in the investigation", said Dr Gupta, adding that there had been unnecessary delays in the case.

"The delay in sending the viscera samples of Sunanda Pushkar to the FBI led to its degradation", he said.

On January 15, Dr Gupta told this correspondent that the FBI had found a few radioactive substances in the viscera, "but due to degraded viscera, they could not read its intensity".

This was contrary to what the police had claimed that no radioactive substance had been found in the viscera.

"There have been many attempts to dilute the investigation. The previous government and the AIIMS administration even tried to remove me from my post so that they could form a new medical board which would give a 'natural death' report. But they did not succeed. I did not compromise with the principles and ethics of my profession”, stated Gupta.

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