spring was still officially days away, but in draper, utah, its promise was clear. morning dew on the brush. the crisp air. the sun rising over the wasatch mountains. it should have been a beautiful day. but for a jogger on the jordan river parkway that morning, it was anything but. >> 911, what is the address of the emergency? >> you know, i'm not real sure. i'm at the river bottom, and there's some pools of blood. and i'm guessing it's just an animal, but in the water right by the river there's a shoe. >> reporter: sergeant chad carpenter was one of the first on the scene. >> we called the forensics out and it was able to tell us it was human blood. >> human blood. changes things. >> we had a human body in the water so we called the helicopter. the helicopter was in the air for just under an 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 wa