Confronted by a police officer with the suggestion that the deaths of her three daughters was not an accident, Tooba Mohammad Yahya (inset) appeared devoid of emotion. “Meaning what?” she responded, through an interpreter, in an interview recorded just hours after police had told her that the teenage girls had been found in a submerged car. “It would mean that something happened to cause it,” Det. Const. Geoff Dempster says, in the video played to jurors Tuesday morning at the trial of the Montreal woman, her husband Mohammad Shafia, 58, and their 20-year-old son Hamed, who are accused of murdering four family members in an honour killing.