a georgia cop on blood mountain had found the bayonet wrestled away from gary hilton. now investigators in florida had a theory. >> what was interesting about that knife is, before we knew of mr. hilton, before he had killed ms. emerson and been caught, our analyst in our lab showed us, this is the style -- this is what the knife's going to look like. >> cameras and memory cards were found inside the van. the techie detectives in the fdle computer lab were working overtime trying to unscramble deleted material from the evidence. and deep in their dna lab more than 700 samples were being analyzed in an attempt to find some link between gary hilton and the late sheryl dunlap. had gary hilton managed to outsmart them all? would florida be able to make the case against him? four years after sheryl dunlap's death, it was finally going to trial. coming up -- >> your palms are sweat wrand your heart is beating. >> the dramatic case begins. how would it end? >> you could just see the jurors, i saw it in theirize, they knew. >> when with "dateline" continues. no, please, please,

the specific information given as to the location of the body was given to me by gary hilton. >> the rge was anted up. >> mr. hilton is charged with one count of murder of meredith emerson. he has been taken into custody and brought to our detention center.

hilton hotel. stars in attendance include meryl streep, margo robby and gary, the oscars will be held march 4th. >>> and music legends paul simon is retiring. the hall of fame singer songwriter announced on line his upcoming tour will be his last. simon says touring takes time away from his family, farewell tour kicks off in may. simon will perform at the wells fargo center in south philly on june 16. >> and, i got it tell you justin timberlake stole hearts dupe the super bowl half time show, one fan had an unforgettable moment. thirteen year old smashed a selfie with jt and it went viral. he said he is a huge just justin timberlake fan, turns out he's a patriots fan, but his epic selfie definitely made up for the loss. nice to hear that he is a jt fans because i was cents seeing on facebook, social media, you know, he's three probably doesn't even know who justin timberlake is. good to know he does, and i think he was shellshocked. like he did not see that coming. he's like uh, you want to take a selfie with me, oh, okay, and fumbling with his phone. poor kid. he was just like what's happening rig