Kolkata, May 15 -- The Enforcement Directorate (ED) late Thursday arrested Kolkata Police deputy commissioner Shantanu Sinha Biswas after 10 hours of questioning in connection with suspected multi-crore land transactions that surfaced weeks before the recent assembly polls, officials said. "Sinha Biswas was summoned five times since mid-April but did not report to the ED office at Salt Lake. He was arrested after he refused to divulge the source of huge monetary transactions and the details of the properties he owns," an ED official said, requesting anonymity. ED suspects that Biswas is linked to city-based real estate businessman Joy S Kamdar who was arrested in April and Biswajit Poddar alias Sona Pappu, an alleged land grabber and extort...