sergeant chad carpenter was one of the first on the scene.d carpenter: we called forensics out, and we did a presumptive test, which was able to tell us that it actually was human blood. dennis murphy (voiceover): human blood-- that changed things. chad carpenter: that made us think, ok, we might have a body in the water, so we called the highway patrol helicopter. dennis murphy (voiceover): the helicopter was in the air for just under an hour before it spotted something about a mile north of where the jogger saw the blood. it was caught up in some branches. as the chopper got closer, it was clear. there was a body in the river. dennis murphy: sergeant, when the divers pulled the victim out, what were the injuries that they observed to her face/ she had a laceration here on her forehead. her face was very swollen, so we weren't able to tell to what extent the injuries were, and we couldn't even identify who she was. dennis murphy (voiceover): their jane doe, dressed in a red and white plaid shirt, looked to be about 20 years old. her features