I am also Romanian, that's why I suggested you to start a topic in the Romanian board.
Although you don't know the exchanged they used, you could obtain other valuable information if you would share what I asked you above:
Besides all these, where did you find these guys? Are they forum users... LocalBitcoins users...? Can you share their usernames if so? I don't think you just bumped into them while walking on the street, therefore mentioning their origins may be useful.
What are their names? Phone numbers? At what bar did you go?
But, as far as I see from your answers, either you are not
that interested in catching the thieves or you don't understand what I'm writing here.