this is just sick, the amount of violence she suffered most likely changed her forever into a different person. Also they went into a extra leap for calling her parent explaining what they were doing to her, this is beyond anything i ever heard.
how someone should deal with this? as a parent i would probably go berserk on them; as a citizen the notions of justice and human rights are important ones and should be respected for a healthy society; the victim should see justice applied to the culprits and they should receive the properly penalty for a crime as cruel as this one; the problem is, if proven they are guilty, how to deal with this without becoming a monster as they are? kill them? how? slowly, faster? put them into prison for life, having the state paying for them to live and the victim knowing they are alive?
we, as a society, should not let this things go unpunished and just the notion that they could get away because of a technical detail or some legal crap, it disgusts me.