and lo and behold he was right. that dna result came back and the semen found on angie s body didn t belong to ben hobbs or chris tapp. neither one of them. what went your head when the dna results came back and it showed theit attacker was not ben hobb? if you nail it down to one word, it s frustration. reporter: the detectivesrd decided that didn t mean chris was lying or that the thoroueor the crime was wrong. . may only mean they decided to expand the theory. the two werehe guilty they were sure of it g so the mystery dna must have come from a third man, a third attacker. so they put tapp back in a littlek interrogation room and asked him was a third man involved in the crime? and sure enough chris tapp said, yes, there was a third man. but no matter how many times detectives noasked, he couldn tr
were similar to or the same as the victim. reporter: he said they either hers or they are not. just as you thought. ed where are the hairs? i said, i assume that they are still in evidence. reporter: so they called the idaho falls police department which found the hairs in an envelope in the evidence room where they shall be stored all of those year. after carol s calls though pubic hairs were sent offer to the crime lab where dna tests showed that chris tapp was there at the cream scene and ben hobbs was there at the crime scene, or that the entirety of the physical evidence was left by one unknown third man. that was a fundamental question that was huge. the answer from the dna? left no doubt. only one person who did this in term of the dna. reporter: one killer. the science said there was no evidence there were three attackers in angie s apartment that night as the police had theorized but just one.
chris tapp was involved in the attack, and unknown third man left the dna in the form of semen. three attackers. the identity of the third is still a secret, unrevealed by either the other two all of those years later. and about the fact that carol dodge now disagreed with their theory and was supporting chris tapp, the only man in prison for the murder? what is it like to know that carol is actively campaigning for his release, believes an innocent man? i think that is part of the process. in some respects, her heart has been broken. reporter: she is convinced gout the wrong guy. when i heard that i was i was genuinely surprised. it s been a roller coaster 16 years for her. today or tomorrow chris would be guilty in her mind. reporter: perhaps now is a good time to talk to the man in middle of all this. the serial confessor christopher
literally trying to drag the name of that third man out of tapp and when carol saw the tape, well, you watch it. by the time you had gone through all of those tapes, what did you think about chris tapp, the man you believed up a of those years how did they do this to me? how have they managed to keep someone in prison for all these years and it s a possibility he is not there. reporter: after that eureka moment, carol dodge made a decision. she would do more than search to find her daughter s killer. she was actively work to free christopher tapp, the only man convicted of the murder. i think that chris case truly got taken seriously after i made my contact with boise state. she was the first victim s
wouldn t tell them who it was. so prosecutors made a decision, if tapp wasn t going to tell them the whole truth he wouldn t get his deal. chris tapp was charged with murder but only chris. not enough evidence to go after hobbs or anyone else. the announcement caught carol dodge by surprise and detectives had kept her in the dark until now. but one look at christopher tapp in court she knew she wanted him dead. it was final i was looking somebody in the eye i thought devil who had taken my daughter s life. reporter: chris tapp was found guilty and sentenced to life in prison a for angie s murder and 20 years for rape. which is when carol dodge s odyssey really began. her own investigation filled with danger and surprise as a very troubling discoveries. one discovery so disturbing that angie s mother reached out