According to the NG show with the dad and stepmom, the stepmom first said that Karlie was wearing a white t-shirt and jeans. That later changed to white-t-shirt and grey sweat pants, which is what the sightings said the girl they saw was wearing. The dad and step-mom said they had no idea what clothing could be missing from Karlie's closet as she has so many clothes so they couldn't definitively say what was missing.
The stepmom did say on NG that the last time she saw Karlie that Karlie was wearing a white t-shirt and underwear but not pants.
Yes, I agree. We don't know how far the people were from the female they saw, I don't know how light it was, and I don't recall the times of the sightings. Technically if someone's fairly far away, then any female with long hair and slim build could have been mistaken for Karlie? But is it the time of year to be out in t-shirt and sweatpants...I suppose if someone was out for a jog that would be appropriate clothing. I guess if LE knocked on doors they would have asked if anyone was out jogging that morning and if it was someone else then LE would tell the family that one or more of the sightings might not be Karlie.
We don't really know enough about Karlie to know if she would walk out without packing a bag and taking her phone. It seems she has at least three people she could call if she had taken the phone with her, an older brother, her boyfriend, and her mom. If she was feeling like she wanted to get away, then she could have called her mom to see if she could visit or move permanently back to her mom's?
Maybe Karlie did go out for a walk, hadn't eaten much since the previous day and still suffering after effects of the pot and being up all night and had a fainting attack? Why wouldn't sniffer dogs be able to follow a trail to her? Could Karlie have thumbed a lift in a car on the highway? Would there be a lot of traffic at 7.30am on a Saturday?