Sources said that lokayukt, NK Mehrotra, who was handed over the investigation into the above matter, during 16-months long probe had summoned the then chief secretary, Atul Gupta, over half a dozen district magistrates of the districts where sugar mills were sold along with additional district magistrates, officers of registry and stamp department etc. He also invited the public to appear before him and record their statement or even provide any evidence so that the guilty could be brought to books.