an attorney and he recanted his confession. the cigarette butts at the scene were given to analyst ken bogan. he cut them open to extract any cells that might be present from saliva. >> there usually is no problem in extracting dna from cigarette butts. it's just usually a matter of how much dna is deposited on the cigarette butts. >> the saliva on the cigarettes came from jonathan binney, proof he was at the scene. investigators found a .9 millimeter weapon in the open field in between the binneys' home and the crime scene. scientists fired a test bullet and compared it to the bullet from the crime scene.