This is my theory (so far) ...
There were ST recruiters in the area. Someone took note that SP jogs and by herself. They were out that morning, and saw her again. They decided this was the right time to stop. They asked her for directions (being 2 females); SP assisted them. Then a weapon was pulled which then they demanded her to put the phone down and get in the vehicle. The reason her hair was caught in it is because she took it off quickly. I have fine, blonde hair and it tends to get caught into everything.
She put in down slowly; hence the earbuds neatly in a bundle, trying to buy time in case someone else came by while this was all taking place.
They abducted her, kept her, tortured her, just to realize this was mistake due to publicity, so they decided to release her.