Darlie Routier testified that an intruder killed her children but police found inconsistencies between her report and the crime scene evidence.
During the 911 call, Routier can be heard saying that she'd found a knife on the floor. The 911 operator, thinking that Routier was speaking to her, told her not to touch anything, to which Routier responded that she had already touched it and picked it up and later said, "We could have gotten the prints, maybe."
Although Dr. Alejandro Santos and Dr. Patrick Dillawn referred to Routier's wounds as superficial, her neck wound came within two millimeters of her carotid artery. Blood spatter expert Tom Bevel testified that cast-off blood found on the back of Routier's nightshirt indicated that she had raised the knife over her head as she withdrew it from each boy to stab again.
Routier's bloody footprints were found underneath a vacuum cleaner and broken glass, indicating those items had been placed there after she went through the kitchen instead of before, as she'd claimed. In spite of broken glass being in the path of her bloody footprints, Routier had no corresponding injuries to her feet.
Newscasts appeared of Darlie Routier and other family members holding a birthday party at the children's grave to celebrate posthumously Devon's 7th birthday, just eight days after the murders. Routier, smiling and laughing, appeared jovial as she sprayed Silly String on the graves in celebration of Devon's birthday.
Four days later, Routier was charged with capital murder.