>> all that evidence from the van was added to items recovered from the dumpster outside atlanta where hilton was recovered. 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