My question involves labor and employment law for the state of: MN

Hello, I am new here. I have a situation that I am asking on behalf of a friend. She was employed at a salon for six years with more than 50 employees in a 75 mile radius. During her employment, she developed a substance abuse problem. There was never any use at work, but she chose to disclose to the salon owner and went to treatment using FMLA. When disclosing, the salon owner made discriminatory / harassing comments. ("Addiction is a choice and you were stupid enough to choose it" is one example, there are others.) When my friend returned to work after successfully completing treatment, the salon owner began treating her differently, giving her work to do that she had never had to do before, and she struggled with it. The employer then put her on a FCA (formal corrective action) and gave her 30 days to turn it around. She followed the plan best she could and completed everything, but not the way the salon owner wanted it done. She was subsequently terminated two days later.

My question is, is there any legal recourse for discriminating against people with disabilities? She has stayed clean since going to treatment, and has done her job, but ever since telling the owner she had a problem, the owner has treated her badly.

I understand that employers can fire you for any reason they like as long as it isn't against the law. Is the harassment and discrimination enough to contest in court? She has a lawyer that thinks she has a case.

Thank you in advance.

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I should add too, she declined a severance package, didn't sign anything when terminated, and was found eligible for unemployment insurance.