 2015 saw his first and only documentary feature Vithanage, titled "Usaviya Nihandai" (Silence in the Courts), an investigative docudrama chronicling the events followed, after a Wife of a robbery suspect was being raped by the presiding magistrate of the case and an alternative newspaper editor exposing that case, engaging in a prolonged legal battle that extended into a probable impeachment of chief justice of the country, but eventually accused parties getting away scot-free while denying justice to the victim.When asked "Why did you choose this story to explore social justice in Sri Lanka?, Prasanna Vithanage replied saying, "The fairness of carrying out social justice is best judged by how judicial branch will act when one of their members is accused.My goal was to go into depth and unearth the real story from the original sources and a re-enactment of those incidents in the form of a docudrama."