Do i have a retaliation lawsuit?

I got to work tuesday morning and upon my arrival i was told not to clock in. I was called into my supervisors office, and in her office was the HR supervisor also. To make a long story short, one of our clients in the program that i work for is filing a discrimination lawsuit against our company. I was contacted by this client and asked if i would testify that he was discriminated against. I didnt give him an asnswer yet for fear of losing my job, although i must say he and several other clients were discriminated against.
When i was called into her office that morning, both my supervisor and the HR person grilled me about this clients lawsuit, and asked me where the files were for him, i didnt know where they were, so i told themi didnt know. They then proceeded to tell me i was laid off due to restructuring of my position. Basically they were firing me for this clients lawsuit. They told me i would be eligible for unemployment beginning January 2012 and that they were giving me a paid leave due to a grant they received that required me to be employed until the end of the year. This is retaliation against me for someone elses lawsuit and them asking me to testify.