>> they continued to investigate ferry. months went by. lead detective derek johnson was promoted to sergeant, which meant jaclyn moore's dream of making detective finally came true. maybe a case of beware what you wish for. one of her first assignments was the annie kasprzak murder. how did you feel about it? that this was now going to be your case? >> i cried for two hours. >> jaclyn decided she needed to start again from the beginning, following the chain of evidence that led her colleagues to daniel ferry. she thought she might link ferry to annie through his phone calls. but when she checked -- >> all of his cell phone records showed he was in the middle to northern part of salt lake county. he had never gone south, close enough to where annie was killed. not even near her house. >> and she well knew the physical evidence wasn't there either. >> none of the dna came back saying annie was ever a friend