The arrest of retired judge Giribala Singh by the Central Bureau of Investigation (CBI) has transformed the mysterious death of actor-model Twisha Sharma from a suspected dowry death investigation into what investigators now believe may also be a case involving alleged destruction of evidence, digital manipulation, and a possible attempt to conceal what really happened inside a prominent Bhopal household on the night of May 12. NDTV's Apurva Adhikari reports.