I have two thoughts, either agree with your thinking that she was left alone with only one person, or, she called someone to come pick her up and truly did leave. That the men haven't caved yet, that no trace of SS has been found with the ground searches. It leaves me puzzled thinking someone possibly could have picked her up.
That her phone didn't turn off until 8:30-ish.......strange to me. If it was someone in the car with her, surely they knew of the FaceTime call she had with her mom? They knew she said she would be home in the morning. If they have to get rid of her, they would know to get rid of her phone too. Unless she dropped it in their house and they didn't know it was there until later when they went to clean up. But again, wouldn't they have pings/reports on her phone by now to show where at least the phone was, even if the phone was destroyed?
And I still don't get FaceTime. I'm curious to know if he mom called her or FaceTimed her first? Did her mom call and SS FaceTimed back? I have kids, a little younger than SS, but FT isn't even an option in their minds. It's text, text, text. Especially if they were older and out at 3AM with strange men. I don't get why SS didn't just TEXT her mom back. Less questions, less seeing if SS was intoxicated or not, less having to argue with her mom. Why did she FaceTime? That's a big question to me. I feel she left the bar on her own, but I'm wondering if once in the car and they started telling her mom to "chill", did she realize it wasn't a smart decision and was looking for her mom to "lay down the law" and say she would come and pick her up?
Driver, SS in front and two people in back. Am I wrong that I thought I read they dropped one of those men off at another car then he followed them. When they dropped him off, I'm thinking SS jumped in back and that's why one of the stories says both, front seat and back seat?