, in the nearby town of richfield, police there are investigating an assault on a woman named melissa etzlerwho was walking her dog at a local park. she remembers every detail about her attacker. 20 years old, about six foot one, 200 pounds. she also remembers every detail about his minivan. it's traced to a couple whose son matches the profile. >> i told him we needed to talk to him and he said okay. i asked him where he was. he said he was at jesse blodgett's vigil. >> you heard that right? he was in jesse's parents house where she was killed. his name? daniel bartelt. jesse's one time boyfriend. when the police called dan. >> dan was at our house crying over jesse. >> yeah. >> and sharing memories with us. >> but when police returned to the park, they uncover a side of daniel that no one could have possibly imagined. >> they go take all the trash out of the trash bins at woodlawn park. they find the cereal box along with rope, a roll of duct tape, and dan's blood on multiple items at his house, detectives find grotesque images on his computer. >> what do you think happened to jesse? >> pi