i couldn't sleep. there was no way. it didn't really matter. i didn't care. and it was amazing because we had technicians at colorado bureau of investigation who had no necessary buy-in into this was but they were working around the clock as well because they knew what a big deal this was. >> reporter: 60 miles away in denver detective nash gurule was also awaiting those dna results, anxiously. but he was also angry. >> at myself. >> at yourself? why? >> thinking to myself, what else could i have done to prevent this? >> what other evidence could i have gathered that would have got him arrested? >> did i miss something that could have kept him there? i could have had something concrete to arrest him on. what did i miss? and i threw that around in my head. >> you take this stuff personally. >> this one i did. and i'm thinking to myself, is he that smart? is he that smart? >> reporter: and now forbes was out here, somewhere. friday night, dark now. it was warm in fort collins.