Do I have a case if I was fired for false reasons from someone with same upper mgr position falsified information to HR to purposely get me fired?

-A male employee in same corporate position attracted to same sex would ask me out for shots, I would never respond, felt too uncomfortable. -He would make several sexual references -Would often attempt to ridicule me in front of our employees until I advised him to stop then quoting company policies explaining how we had the same position, I feel he retaliated. -Has been with company for 12 years, purposely notified HR and strategically falsified information in accordance to terminal HR policy to get me fired although the documented information was in my favor clearly contradicting the claims. -One of the produced claims for letting me go contradicts the actual company policy.