they found her. >> i could see the two girls laying there. it was horrifying. >> the only thing we have our cigarette butts and suspicion. >> dna would point one way. >> he's like you have to take a look at this. >> a bombshell message would point another. >> i read the letter and immediately knew this was something very important. >> a twisted trail lead accident to a sinister suspect. >> takes a special kind of mind that wants to do something like that. >> to crack a case this convoluted, it might just take a miracle. >> that was extraordinary. >> i just couldn't believe it. >> welcome toll dateline. two young women were discovered in a park bound and gagged. both were sexually assaulted and shot in the head.