Fake Job offer :- from 12 Engineering students total 18 lakhs

Dear Sir I'm one among the problem happened in 2014 September . I got an offer from a friend of my Lecturer. Due to my family poor background I tried to jump to that to earn money quickly .. But now I'm suffering.me and my 11 friends gave 1.5 lakh each to a person he named Mahindran he is also a lawyer in Chennai . He offered A job in abroad and said March we wil defenetly fly to Singapore . but we trusted him because he s good friend of my Lecturer. But later We realise that he took our money for some adjustment of his own. He settled one of my friend almost 1.3 lakh returned so far he s a good friend of him . none of them never receive money a few amount like 10000 only he returned .. He asking more and more time so far I took tht amount for interest I'm still paying interest. He extending dates .. This happened in Chennai and two of them are keralites others are tamilnadu , we together tried a lot to get back money . he slipped away... He said that if we gave case in station then u won't get ur money back .. Please help us.. He s lieing every time ...