Will my spouse be able to tell the prosecutor to dismiss my Michigan domestic violence case?

If charged with DV in Michigan, the alleged victim will speak to a victim advocate who is usually employed by the state and either part of the prosecutor's office or works closely with the prosecutor.  That advocate has special training and access to resources for a true victim of domestic violence.  

It's not common that the alleged victim has direct contact with the prosecutor other than potentially prepping for a trial.  Prosecutors in Michigan for the most part do not dismiss cases because the victim requests it - they consider their wishes in maybe reducing charges or offering 769.4A status, but the case doesn't go away upon request.  So no, your spouse cannot get the case dismissed by asking the prosecutor.  If they wish to be helpful, they can expand on information of the case, and maybe clarify that the incident was more mutual than first thought and if they made statements out of anger and not truth, then they should clarify or make a new statement.  It will help in resolving the case, and would provide a more accurate account of the case for both sides.