Thanks for the clarification.
You have a couple of options. You can sue the employer yourself and seek up to 4 years of past unpaid wages (4 years is the limit under the law), or you can hire an attorney to sue the employer for the back pay.
Finally, you can ask the state to assist you to get the money owed you by filing a wage complaint with the state. Here is a link to the process and the form that you will fill out to have the state assist you in your claim: http://www.com.ohio.gov/documents/dico_MINIMUM_WAGE_COMPLAINT.pdf
And yes, he would get in a lot of trouble with the state and the feds---9n terms of state and federal tax withholding, the lack of workers' compensation and unemployment insurance. The employer could be fined tens of thousands of dollars in fines depending on how many employees are effected.
You may reply back to me using the Reply link and I will be happy to continue to assist you until I am able to address your concerns, to your satisfaction.
Please know that I answer your questions in good faith, providing you with the information that you ask for, and I do that with the expectation that you would act likewise, and rate my service to you. Rating me costs you nothing as you have already paid the deposit for my help, or you are a subscription customer already. All rating does is ensure that I am paid for my time in working with you. So, please do be sure to rate my service to you. Rating is accomplished by clicking on the rating-stars on your page. Thank you in advance for your positive rating.
I wish you and yours the best in 2016,