Umashankar, an IAS officer tricked his way into becoming an IAS officer by producing false certificate. This came to surface and had to be suspended.
His parents Chellakani and Suganthi, though Hindus by birth, converted to Christianity (most likely bought over by some pittance of money by the Christian proselytisers and were Christians at the the time of their marriage. As such, Umashankar was a born Christian.
Umashankar converted to Hinduism on February 14, 1984 and applied for the issue of SC community certificate claiming that he is a Hindu Dalit and got the certificate on October 23, 1986.
On the basis of this false SC community certificate Umashankar was allotted to IAS service on a Scheduled Caste quota. The rule was clear that reconverted Christians (who do so only to enjoy the reservation) are not eligible for reservation.