Kolkata: Bharatiya Janata Party (BJP) leader Suvendu Adhikari on Thursday attributed Trinamool Congress supremo Mamata Banerjee’s defeat in the Bhabanipur Assembly constituency as the reason his executive assistant Chandranath Rath was murdered. Speaking to reporters, Adhikari said that there was only one reason for killing Chandranath Rath. “He (Rath) was my executive assistant. And Mamata.