After the case is closed, Vikram is standing by his car when a sniper fires a shot at him. This was not related to Swapna’s crimes but was a separate plot point intended to set up the franchise's overarching mystery. Why Did Vishwanath Target Vikram?

To understand who tried to kill Vikram, it is important to distinguish between the case's antagonist and the mystery attacker from the final scene:

The investigation into the disappearance of Preethi and Neha leads Vikram to his own colleague, Rohit , and Rohit’s wife, Swapna (or Sapna). Swapna was the mastermind who kidnapped and accidentally killed Preethi out of an obsessive past connection, while Rohit acted as an accomplice to protect her.