I find it hard to believe that 10 POI's all had a part in this. In fact, I think it's likely just 2-3 max. I think that the more people involved in a crime, the more likely someone would have cracked by now. I don't get the feeling these were "bad" kids. I think they were probably good kids, caught up in the party crowd, who made a really bad choice. IF the boys are involved, I really think it was probably some cover up of an accident or OD. I don't think there was a murder. I think they all acted out of fear. A couple or few may be able to contain that, but not likely 10.
Regarding her being in a car at the airport, while stranger things have happened, I don't see the likelihood of any student taking a car to the airport and leaving it to fly home for the summer. A. If they have a car, they'd likely drive home. B. It would be VERY expensive to pay to park a car at the airport for the entire summer. I have kids their ages. If my kids drove home for the summer, there's NO way they would not have been back in their car by now. In fact, we probably would have gotten a quick kiss and they'd be off to see friends within a few minutes of getting home for the summer.
Regarding her being in a car at the airport, while stranger things have happened, I don't see the likelihood of any student taking a car to the airport and leaving it to fly home for the summer. A. If they have a car, they'd likely drive home. B. It would be VERY expensive to pay to park a car at the airport for the entire summer. I have kids their ages. If my kids drove home for the summer, there's NO way they would not have been back in their car by now. In fact, we probably would have gotten a quick kiss and they'd be off to see friends within a few minutes of getting home for the summer.