PATNA, April 13 -- Leader of the Opposition in the Bihar legislative assembly Tejashwi Prasad Yadav on Saturday alleged that the state police administration has miserably failed to implement the prohibition law, leading to the rise of a powerful liquor mafia and the emergence of a parallel economy in Bihar. "There is a parallel economy worth Rs.40,000 crore running through the illegal liquor trade and black marketing. This figure is nearly equal to the total internal revenue earned by the state government," Yadav said while addressing a press conference in Patna....