The Best Detective Agency in Kolkata<br /><br />Biswas Private Detective Agency in kolkata is simply the best Detective and Investigative Agency in Kolkata. We take much pride in stating that we are one of the premier private investigation organizations who had a humble beginning as a small detective agency. We have earned a reputation over the years by successfully completing numerous investigative matters. Now, we are one of the most reputed, respected, well-known and professional detective agency in Kolkata and India