The Central Bureau of Investigation (CBI) has made significant progress in its investigation into the NEET (National Eligibility cum Entrance Test) exam paper leak, arresting PV Kulkarni, a chemistry professor from Pune, Maharashtra, who is described as the 'kingpin' of the conspiracy. The leak, which has impacted nearly 23 lakh students, was uncovered after it was found that Kulkarni, who had access to the exam papers through his role with the National Testing Agency, leaked questions during private coaching sessions held shortly before the exam on May 3. During these sessions, he provided students with questions and answers that matched the actual exam paper. The CBI's investigation has led to eight arrests so far, including that of Manisha Waghmare, who allegedly lured students with promises of leaked papers in exchange for large sums of money. The agency is now expanding its investigation to identify other individuals involved in this extensive network, conducting raids across various states and seizing crucial evidence for further analysis.