That civil case will be dead on arrival unless you reopen the criminal case and get your conviction vacated. If you were convicted in a court of law, your incarceration cannot be considered false imprisonment.
You would have to find an appellate attorney to file a delayed appeal, motion for a new trial, or post-conviction petition. None of these options are easy roads -- especially after the case is closed -- and they will require an attorney to engage in long hours of historical research and legal work.
Can you bring the suit? Sure. Is it likely that you will be successful? No. Even when a person is not convicted these cases are extremely difficult. They are almost impossible if a person is convicted. With regards to your contingency question. It is unethical for an attorney to take a criminal case on contingency fee. Your plea withdrawal would be considered a criminal case and therefore an attorney is not ethically permitted to take this case on a contingency fee. The false imprisonment could be contingency but because of the remote possibility of success I imagine it will be difficult to find an attorney willing to take the case. Good luck.
Attorney Chris Beck
Beck Law Office, L.L.C.
The responses of Attorney Chris Beck to any questions posed on Avvo do NOT establish an Attorney-client relationship. Attorney Beck is available for private hire and consultation for a fee. Only after Attorney Beck is retained as counsel, or agrees to discuss this matter with you privately, shall he be legally deemed to be your Attorney. His responses herein are an attempt to assist persons temporarily based upon the very extremely limited amount of information provided by the questioner
The proper time to say not guilty is at arraignment. You should have also asked for an appointed lawyer at no cost if you qualified at arraignment. I am unclear if you pled guilty or were found guilty. You missed the deadline for appeal.
Most jails are under a sovern immunity unbrella. As long as your papers said hold him six months, they acted in good faith. They are also usually immune from ordinary negligence. You would need to retain a lawyer to recall your plea if you were not found guilty at trial. If you could even find a lawyer to try this it could cost several thousand dollars. It cannot be contingent in Ohio in a criminal case.
Your best bet might be to hire a lawyer to investigate your right to an expungement.
You cannot sue for false imprisonment in Ohio if you were convicted and the conviction has not been vacated. Even if it is vacated and there is no conviction, these claims are very hard to win in Ohio. A not guilty verdict does not guarantee a win.