While I agree with you that she likely went missing on her run, sometime before 9:00 p.m., there is another scenario. While on her run she has a Eureka moment about her schoolwork, perhaps while listening to a lecture on her iPhone, and gets back to DJ's house 8:30ish. She sits down at the keyboard, without taking off any of her sweaty running gear or armband in her rush to bang out her epithany. 9:30ish she realizes that she still has to go by her mom's to pick-up the car and a red work shirt for the next day. She sends DJ a SC @ 9:45, and walks out the door to jog to her mom's. She is taken shortly after leaving the house, leaving her final digital footprint as she is taken South past the hog farm near Guernsey around 10:00 p.m., on the way out of town, headed towards the Southern most red dot on LE's map of areas of interest.