Byomkesh Bakshi by Subhajit Das in West Bengal

Byomkesh Bakshi is an Indian-Bengali fictional detective created by Sharadindu Bandyopadhyay. Referring to himself as a "truth-seeker" or Satyanweshi in the stories, Bakshi is known for his proficiency with observation, logical reasoning, and forensic science which he uses to solve complicated cases, usually murders, occurring in Calcutta.