Basically an oold friend of her persented the scammer guy to her...now she is trying to reach to her friend for telling him what happened, but he wont answers the phone...started thinking that maybe he is part of it too...she cant find or meet the guy for now .
Damn, that's unfortunate. Have you reported him to the police? You should be able to do that right? Considering that she knows his face and probably his name too. If the police are quick, they should be able to track him down if he's still in your country. If not, then I guess you can still rely on the Interpol.
That really sucks, but perhaps in the situation that we have right now, there are a lot of scammers that will really convince you because he/she is supposedly a "friend of a friend". So who wouldn't fall for that trick?
But in this case yeah, people will do that because of the money involved and it's really very unfortunate that this has happened.
So the best case scenario here is just filed a police report. Not sure though how the police will response as this is a special cases for them but currently this is the best recourse of action. And hopefully they catch the criminals.