. >> reporter: prosecutor dan feinberg got the autopsy results.re not helpful. >> only half of the bones in her body were recovered. and some of the more important bones like the hyoid bone which would show whether or not there might been a choking or strangulation was not recovered. >> reporter: the medical examiner, though, found evidence that four of tara's ribs were fractured. >> a perimortem fracture, a fracture that occurred at the time of death. >> so there's a big, big slam into her ribs somehow. >> the medical examiner clearly found that there was evidence of a violent struggle. there was evidence of blunt force trauma and that would contribute to her death. >> reporter: detectives scoured the woods, looking for anything that might tell them something. they found a belly button ring near the bones. the kind tara wore, sharon confirmed. and the remnants of only one piece of clothing that belonged to her, a pair of panties. but no hair, no fiber, no dna of any kind at the scene that would help them i.d. a killer. >> it was frustrating for t