Thank you for your question. I look forward to working with you to provide you the information you are seeking for educational purposes only.
Under the law, the prosecutor has the sole discretion of "who, what, when, where and how" to charge any defendant. So a prosecutor has a right to evaluate a case and make a decision on what they believe is the appropriate charge that they can obtain a conviction on based on the witnesses, evidence and situation and also what would be in the best interests of justice
. Many times prosecutors reduce charges because it is easier for them to secure a conviction based on it being easier for them to prove all of the elements of the lesser offense. As a victim, you have a right to ask the prosecutor about the reason for their decision, but there is no legal means to force them to change that decision. If you are claiming a conflict of interest in the prosecution, then you can file a complaint
about that conflict with the Attorney General's Office to ask for them to intervene and examine the case and you also need to speak to the special prosecutor (who I am assuming was appointed just because of the conflict of interest) because the special prosecutor can change the charges back to the more severe charge as well and that is within his discretion as being the new prosecutor on the case.
Also, what they charge the person with or what they convict them of does not impair your ability to file a civil suit against the parent for any physical or emotional harm suffered by your child. So, regardless of what the prosecutor changed the charges to, you can still sue the parent of the child in civil court