India, Aug. 2 -- A police raid last week on the Birbhum home of a stone trader's brother-inlaw, which turned up close to Rs 50 crore in cash and gold, has escalated into West Bengal's ruling BJP's sharpest attack yet on the previous Trinamool Congress government, with Chief Minister Suvendu Adhikari alleging that former Chief Minister Mamata Banerjee's administration enabled an estimated Rs 15,000 crore revenue leak in the district over 15 years. Officers raided the residence of Minar Mondal, described by police as the brother-in-law of fugitive stone trader Mohammad ceedings are under way to confiscate 21 properties. Nazibuddin-widely known as Tulu Mondal-seizing cash and gold worth close to Rs 50 crore in an operation so large that mult...