We are talking about a teenager, not a small girl. Teenagers are very independent and strong-willed. The fact that this man was known to the family makes it all the more puzzling. Kidnapped by a creepy homeless man, and she felt she couldn't get away? For almost a year? They obviously went out in public on occasion.
And this Stockholm Syndrome doesnt fly yet. People who are brainwashed do not get over it in a few hours.... The fact that she is happy to be home indicates there was no brainwashing