The call was allegedly made to Abdul Rauf Merchant at Dawood Ibrahim’s behest (right) Abdul Rauf Merchant was serving a life term for murdering Gulshan Kumar

What assignment did Dawood Ibrahim have in store for his close aide and Gulshan Kumar’s killer Abdul Rauf Daud Merchant? That is the riddle the Mumbai Police is trying to solve, after Merchant was brought back from Bangladesh on Sunday. He was interrogated for an hour by the crime branch, during which they got to know that the call which made Merchant jump furlough was on behalf of Dawood. November 6.