based on the forensic evidence, david kopenheffer was arrested and charged with kidnapping and first-degreeone of the things that we did is get a writing sample from kopenheffer and had him spell "exactly." he misspelled it in the writing sample the same way it was misspelled in his computer. again that's to correlate the fact that he's the one who inputted that stuff into the computer versus some external source. >> david kopenheffer was tried and eventually convicted of first-degree murder, and was sentenced to life in prison. >> david kopenheffer is the master manipulator. it's an intellectual game, an intellectual challenge to see how far he can push the system and what he can get away with. >> i think if he were out he'd kill again. he'd put a contract on me and harry weiner while the trial was going on because we were key witnesses against him. i don't think that he would stop at anything. >> despite the overwhelming amount of forensic evidence against him, kopenheffer continues to maintain his innocence. >> that's the arrogance of the man, that despite overwhelming evidence as to his

based on the forensic evidence, david kopenheffer was arrested and charged with kidnapping and first >> one of the things that we did is get a writing sample from kopenheffer and had him spell "exactly." he misspelled it in the writing sample the same way it was misspelled in his computer. again that's to correlate the fact he's the one who inputted that stuff into the computer versus some external source. >> david kopenheffer was tried and eventually convicted of first degree murder and was sentenced to life in prison. >> david kopenheffer is the master manipulator. it's an intellectual game, an intellectual challenge to see how far he can push the system and what he can get away with. >> i think if he were out he'd kill again. he'd put a contract on me and harry weiner while the trial was going on because we were key witnesses against him. i don't think that he would stop at anything. >> despite the overwhelming amount of forensic evidence against him, kopenheffer continues to maintain his innocence. >> that's the arrogance of the man, that despite overwhelming evidence as to his g