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If you have evidence that similarly situated employees who are not African American or union members are being treated more favorably, that evidence would typically support a claim of discrimination for which you should file a grievance with the company.
If the matter is not promptly resolved, then your next step would normally involve filing a complaint with the state fair employment and housing commission and retaining a local employment law attorney to represent you in these matters.
A suit is often not necessary, especially where the employee has not been terminated.
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