I was wondering if the rapist is the one who came to see pia with his parents when she was not married to Sridhar? Later it was revelaed that he was already married. They were close friend's to Brijesh's dad i guess. May be he was upset that he couldn't be the part of this family and is after pia.
I know it's a long shot...but just the thought crossed my mind đ. What do you guys think? Is it a possibility?