Wake County prosecutors typically won't dismiss a case prior to the first court date, because they need an opportunity to speak with the officer and the alleged victim in court. However, there are certainly things that you and your attorney could do to prepare for the court date to give you the best possible chance of getting a quick dismissal. Your attorney can investigate the case, talk to the charging officer, talk to the alleged victim or other witnesses, and even speak with the prosecutor to put the case on his or her "radar" as a case that needs special consideration. Even though this may seem like an easy problem to fix, a prosecutor may just look at the name of the charge - "assault on a female" - and take an aggressive approach, without really knowing the true facts. You should contact a criminal-defense attorney here in Raleigh to discuss your options further.
I would recommend that you contact a local criminal defense attorney who can speak to the District Attorney's office on your behalf, pretrial, to talk about the particular problems with the charge and potentially ask the DA to dismiss the charge before trial. If the DA will not dismiss the charge before your court date, you may be eligible for mediation if your county participates in it and your attorney can help line the case up in that direction. I do not recommend trying to speak to the DA on your own as typically they will not want to speak with you and will wait until the day of court to become acquainted with the facts of the case.
The information presented here, by Attorney Shannon Aldous, is not intended to be legal advice and does not create a lawyer-client relationship.