remembers seeing her mom alive, but then she backs away from it and says, "i think -- i can't remember really." >> i don't know what's in lyndsay's head and in her heart. one day she was happy and then everything changed. >> reporter: the prosecution still had to explain why the two oldest boys were adamant their mom was alive that morning. parkinson told jurors there was a two-day gap between cory's death and the first police interviews with the kids. ample time he suggested, for the boys to be influenced by their dad. >> i think the children were confused as to which day. after all -- >> reporter: how about coached? do you think that he told him a story? >> he had custody of the children from the moment of her discovery until thursday afternoon. so from tuesday till thursday afternoon, i don't know what was said. >> reporter: dr. jane turner, the pathologist detective gibson hired to review the case, took the stand and said science is where the truth lies. she concluded the most reasonable explanation for cory's arms appearing to levitate, is that