Employment Law Questions? Ask an Employment Lawyer.
If I can clarify anything at all for you, please do not hesitate to ask. It is my pleasure to assist you further if necessary....
I'm very sorry to hear about this. In general employers have much discretion when it comes to discipline. They need not be fair or reasonable and they need not reach factually accurate conclusions. The one exception is when adverse employment action is motivated by a legally protected trait, such as race, religion or disability. In that case, it becomes actionable in civil rights grounds.
If you believe you can prove that the same adverse employment action would not have been taken against you BUT FOR the fact that you are African American, then you would have a claim for discrimination under our civil rights laws. Your recourse here would be to file a complaint of discrimination with the Equal Employment Opportunity Commission. The EEOC will investigate and attempt to mediate a resolution with your employer. That not forthcoming, they will either file a lawsuit on your behalf or issue you a "right to sue" letter, which will enable you to sue in civil court with the assistance of an attorney. See here to initiate the EEOC complaint process.