I don't think its fair to jump to conclusions and accusations like that without more details and an understanding of how things are commonly done. First off, did you retain the paralegal (after all, why were they negotiating on your case)? You state they were doing so on behalf of the prosecutor---are you sure that's what happened? Secondly, how critical was the information that was shared with the prosecutor? After all, in most meaningful negotiations, information about the case's weakness is shared with the prosecutor so as to potentially get the charge lowered----after all, the prosecutor needs a 'reasonable prospect of conviction' in order to proceed----by giving them such info, you really are trying to put the prosecutor on notice so that they can't later claim they didn't know of the flaw in their case!
A lot of issues arise from your post. For instance: did the paralegal have your consent to represent you (e.g. you retained them) or did they just interfere in your case without any direction from you? Secondly, was the information shared critical to your case or reasonably necessary to be disclosed in order to have a meaningful resolution meeting with the prosecutor? Keep in mind that resolution meetings are 'without prejudice' at law.
I therefore suggest that if you're concerned about whether the paralegal acted outside their authority then you should seriously consider retaining a lawyer to review the matter and deal with this discretely first. After all, if you simply follow the suggestions of goldom1234 without proving your allegations, you could face a significant defamation lawsuit. This way, if a lawyer agrees with your assessment of the paralegal's actions, THEN you consider reporting them to the Law Society, suing them, etc.
Finally, even if the paralegal's actions were inappropriate, keep in mind that you'll likely have a very difficult time recovering much----after all, your recoverable damages (if any) are likely quite small. Keep that all in mind so that you make an informed decision on whether this is all worth your time, money and aggravation.