Vikas Walkar, the father of Shraddha Walkar who was allegedly killed by her live-in partner Aaftab Amin Poonawala, on Tuesday demanded the latter's parents be questioned in connection with his daughter's murder. If the involvement Poonawala's parents is found in the case, then action should be taken against them, Vikas Walkar told PTI over phone. He also demanded the case be fast-tracked and Poonawala hanged, instead of waiting for a number of years like in the Nirbhaya gang rape and murder case. According to the chargesheet filed in the case, Poonawala allegedly strangled Shraddha Walkar on May 18 last year and sawed her body into several pieces, which he kept in a refrigerator for almost three weeks at his residence in south Delhi's Mehrauli.