Laws Against The Employer Who Is Running A Firm By Not Paying Sal

I have been working with a IT firm for last 3 Years. From September 2015 many of my colleague left the firm saying that his 2 months salary was due,after that couple of other colleagues also left with the same reason,But None of them demanded their salary from the employer because they believed that its impossible to get the salary from the company.This has been a tradition in the company by the CEO to hire people let them work for 2-3 months and pay their 1 month salary after 2 months of working or remove them without giving their salaries talking about poor performance.For almost 3 months he did not pay my salary and kept on giving different kind of Excuses every time. I do not want to keep quite on this matter like others because he is continuously spoiling the career of many freshers by giving them Lucrative offers in the beginning and than spoils amny of their precious months.What should i do? We already lodge a GD in our local Police Station. There are almost 7 persons , who jointly lodge a General Diary. But now the Investigation Officer is saying that he will not be able to recover our salary which is almost total 1.7lakh. He can only try to recover one person money, that also not sure. Please suggest, what else I can do to get my money back asap?