Aftab had transferred money from Shraddha's account to pay bills. The dates of money transfer did not match with his claims of Shraddha's disappearance.
Upon tracing, the location of the May 26 bank transaction turned out to be the Mehrauli police station area, which made police question Aftab that if Shraddha took her phone while leaving, and how can its location be traced to his flat? To this Aftab had no answer and confessed to his crime.