Hire a lawyer who handles these type of cases. The law is very favorable to employees in this area and you can get yourself in trouble without legal guidance.
I am a former federal and State prosecutor and now handle criminal defense and personal injury/civil rights cases. Feel free to check out my web site and contact me at (212) 577-9797 or via email at Eric@RothsteinLawNY.com. I was named to the Super Lawyers list as one of the top attorneys in New York for 2012. No more than 5 percent of the lawyers in the state are selected by Super Lawyers. The above answer is for informational purposes only and not meant as legal advice.
Find a good wage and hour attorney. The prior response is on the money. As the employer(or alleged employer) you have specific responsibilities that you may have breached.
No attorney client relationship has been created by this answer.