I personally recommend George Grellas (grellas on HN), with whom I have worked on a professional basis and whose services I value greatly. He is someone whose advice I would pay for and trust. His firm's website is http://www.grellas.com/ . (I receive no compensation for making recommendations.)

I am not saying this is a case that he would want to take on (only he could say that, and without knowing more details, it sounds to me [a non-lawyer] as though the entrepreneurs are deceiving the investors while obeying the terms of your license).

Likely not in your place of residence.

But google is your friend here.

where are you?