they were convinced that they had enough evidence to put robert denney away for life. ll, a complicated investigation. denney's dna was found of the crime, seen but there is also evidence that they could not linked to him. >> we had alternative suspects. we had a lot to explain in the form of the science. >> the defense seized the opportunity, noting that there were any number of people who might have killed corey. >> there are still unidentified pieces of evidence at this crime. seen. >> robert denney's attorney, rick sitka. >> there are underfunded to find a seaman's saints, fingerprints, hairs, in the victims hands. so, it is a question of who done it. >> not a question of denney she did it, he says. >> to underscore, that denney even took the stand to show jurors that he was just a void extort, not a monster at the door. but it did not work. after a three-week trial, the jury needed less than an hour 200 verdict. guilty of first degree murder. >> denney was sentenced to life in prison, which is where we met for this interview. >> did you murder corey parker? >> no i