very thorough. >> jolly told the jury how little that investigation had uncovered. >> there are no theories. there is no gunshot residue test, no dna test. there's absolutely no evidence that leads mr. smoot to the county on that evening. >> the defense sought to prove that the evidence the state did have wasn't actually incriminating. like the missing gun that shawn owned. yes, it was the same caliber as the murder weapon. but -- >> there are however many million of people this this country who own guns and this was a common wep son. >> the defense also argued that the ballistics report linking it to the bullet at the home had no science behind it. >> there is no scientific evidence of that or any standards that show that. >> there is not currently a standard that shows that every