Gopal Das killed Naba Das as he feared threat to own life: Polygraph report 

Dismissed Assistant Sub-Inspector (ASI), Gopal Das killed health minister Naba Das as he feared a threat to his life from the latter, revealed the polygraph report of the accused. 

During the polygraph test, accused Gopal Das revealed many important facts pertaining to the sensational murder of the health minister. 

During the test, he had said a person named Manoj Bariya had told him that Naba Das had been angry with him. "Manoj told him that Naba Das might be angry with him for stopping his vehicle and reprimanding his supporters. Fearing a threat to his life from Naba Das, he started planning to eliminate the health minister," the Polygraph report revealed. 

Gopal revealed that if he had not killed Naba Das, then the latter would have eliminated him. Gopal also mentioned that he tried to kill Naba Das twice before but failed.