I am sorry to hear about you having to go through this. I would suggest meeting with a competent and experienced attorney to go over your case. In my experience, when reviewing client files / facts, other issues and grounds for a claim surface. Good luck.
This answer should not be used as a final ruling on your case as more facts are needed to fully understand and expound upon your legal inquiry. This answer should be used a short introduction to the legal theories that may apply.
Your claim must be based on substantiated facts and not speculation. California is an employment at will jurisdiction. Absent that you have a written employment agreement or a factually supported discrimination claim there may be nothing that can come out of this. In that case move on and find a better job .
Unfortunately, this is not a criminal defense question. I would advise you to contact an employment attorney concerning the workplace discrimination you experienced.
The 90-day probation period means nothing, unless you have a written contract. Even if you pass the 90-days, you are still considered an "at-will" employee, meaning you can be fired for any reason other than a discriminatory or illegal reason.
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