The Pennsylvania Supreme Court has been asked to grant a new trial to a teen in the death of his father's pregnant fiance when he was 11.
Sixteen-year-old Jordan Brown is in juvenile detention after being found responsible in the 2009 shooting deaths of 26-year-old Kenzie Houk and her unborn son.
The Pennsylvania Superior Court later threw out the Lawrence County verdict, prompting state prosecutors to appeal.
Defense lawyer Dennis Elisco argued Wednesday that investigators never searched the perimeter of the snowy yard for footprints, or explored what might have happened after Brown went to school.
Houk was shot in the back of the head with the boy's youth model shotgun.
Chief Deputy Attorney General James Barker said there's no evidence that anyone else committed the crime.