You must meet a very high standard to prove malicious prosecution. If you are serious about it, you should meet with an attorney to discuss whether you could possibly meet that standard. Litigation, by its nature, is uncertain, and we can't possibly give you a definitive answer under these facts.
You can reach our offices directly at (515) 288-6041. The comments listed here are of a general nature and should not be understood to create a formal attorney-client relationship -- that is, I am not, and I cannot give you legal advice here. I am licensed in Iowa and to become your attorney, I need to understand the particular facts and circumstances of your legal question.