I cannot provide links to unauthorized/pirated content or subtitle files. However, if you're looking for the movie legally with Sinhala subtitles, you can try:
which frequently host fan-made Sinhala translations for Bollywood films. Google Docs Movie Overview ankur arora murder case sinhala sub link
If you want, I can instead write:
as Advocate Kajori Sen, the lawyer representing Ankur's family. I cannot provide links to unauthorized/pirated content or