I'm not sure what "kind of girl" you are referring to. Young, naive, troubled girls would be "easier" targets as opposed to adult, strong, assertive adult women (I hope this is where you were going with SP). But the trafficking culture is changing. It's not simply a "mind game", women are beaten and drugged into submission. The belief that there is a poster child of what the trafficking victim looks like is very dangerous as it leads to many missing persons (women and men) being dismissed as leaving voluntarily. IMO, not knowing exactly what happened to SP, nothing can be ruled out, including trafficking. BBM
http://www.dallasnews.com/news/crime/2012/08/12/abduction-prostitution-of-arlington-woman-shed-light-on-hidden-crime-of-human-trafficking