>> reporter: so long shot, she figured, but detective shaklee called detective gurule in denver. >> so i laid out what had happened, some of the evidence that we had found. >> he set the place on fire and he used bleach on her, around the house. >> and he was silent on the other end of the phone. and then finally he said, "oh, my god." >> and she said, "what do you think?" i said i think it's him. >> i get chills now talking about it because it was quite the moment. >> who was travis forbes? a serial offender hunting women? was he hunting another even now? the two detectives were convinced of it. but as badly as they wanted to lock him away, they just did not have sufficient evidence. so travis was a free man, roaming fort collins at will, and at night. >> "chilling connections" returns after the break. connec returns after the break.