I do not think she ran away either.
I do recall that a member of WS mentioned that there was a website advising runaways to leave behind things that they value so people will assume an abduction.
I know the mom made mention of her never leaving without her charger.My point was that the presence of the charger convinced Marlene that Sierra did not leave willingly, even though one can buy a charger for $5.
If she ALWAYS took the charger and you do NOT think a stranger packed her bag, why is the charger at home? Presumably if she packed the bag, the charger would not have been at home, it would be in the bag.
I consider it possible that she let a non-stranger into the house, and this person packed the bag or made her pack it. It seems like the sort of stuff a teenaged girl might take to school on a Friday (even the full clothing change) but not stuff SIERRA would have typically taken.
But the charger... If she ALWAYS takes it, and it was NOT in the bag and WAS in the house, did she really just "forget" (this happens) or is there some significance?