Gokulnath Shetty, former-banker and key-conspirator in the multi-crore PNB-scam in which diamond merchants Nirav Modi and Mehul Choksi are prime accused, on Wednesday declined to give his consent for undergoing polygraph and narco-analysis tests. Earlier this month, the CBI had moved a plea before a special-court, seeking it's permission to conduct polygraph and narco-analysis tests on Shetty, a former-deputy-manager at PNB's Brady-House-branch in Mumbai.

An internal investigation carried out by Punjab National Bank in the $2 billion fraud involving diamond merchants Nirav Modi in which the key accused Gokulnath shetty cleared 13,000 transactions, way above his authorised limit. Shetty, a key accused in the case who has since retired, managed to remain under the radar despite accusations of side-stepping SOPs.