I'd suggest contacting a lawyer who handles cases under the Fair Labor Standards Act to see if they think you have potential claims.
Contact the labor board or a labor attorney in your state. This is typically a violation of the law that they can help you with.
Any individual seeking legal advice for their own situation should retain their own legal counsel as this response provides information that is general in nature and not specific to any person's unique situation. Circular 230 Disclaimer - Advice given in this response cannot be used to eliminate penalties with the IRS or any other governmental agency.
As stated above, you would be best served by contacting a labor law attorney.
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