killed jonbenet. tom foreman has covered this story from the beginning. he investigates tonight. >> reporter: it is hard for many people to recall it now, but the murder of jonbenet ramsey was little more than a tragic local news story that holiday season of 1996. until her parents appeared on cnn. >> there is a killer on the loose. >> absolutely. >> i don't know who it is, i don't know if it's a he or a she, but if i were a resident of boulder, i would tell my friends to keep -- keep your babies close to you. there's someone out there. >> reporter: john and patsy ram ramsey's comments, the puzzle,