poor condition they told investigators nothing about how she died. but there were thousands of other pieces in the puzzle investigators were trying to solve. hilton's van jammed to the roof with hundreds of items was trucked to the florida department of law enforcement crime lab. >> our crime scene analysts spent day and night literally, weeks. >> that van was a mess, right? >> she lived in that van for weeks. she dismantled that van. >> 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