>> the situation suddenly looked much worse than detective david maurer had thought.ion and called his partner and long-time friend, darren sedlak. >> he said, can you get in here? something's going on. i'm not sure what but shappell just stole morgan's truck and fled and we can't find him. >> we had no idea it would turn out the way that it did. >> their first priority was to find steven shappell. they tried tracking his phone but it was turned off. morgan's phone was in there and it was turned on. she gave detectives her permission to track it. meanwhile, morgan was inside the interview room as detectives tried to figure out what steve was running from. >> do you think maybe steve hurt kevin? >> i don't know, but by his reaction today -- >> he takes your truck without your permission and, in my terms, knees the scene. >> absolutely. >> although morgan had previously denied the affair with steve, the much younger landscaper, she was now telling the detectives they were having a relationship. a result, she said, of an unfulfilling marriage. >> it was just a bad marria