Needing to vent. Sorry it might be a little too much FYI

Venting..... 
Hi ladies please no judging or rude comments.  My little girls dad had gap cps called on him 3 times last year for touching my daughter in her privates. She was down over Christmas break and when she come back she was not acting herself or anything so of course it raised red flags with me.  I talk to the school where she goes and the consuler talked to her and she had told the consuler that her dad had touched her which was my worst fear again.  So she has to talk to cps Monday about it and here lays the problem with that she will freeze and close up about it.  Now her step mom on the other hand has her brain washed that it is okay to be touched in your privates.  Last year when the case was on going he lied about it so of course it was dropped but is there anything that I can do to ensure that she will not freeze or shut down.  I was told by the cps office not to bring od dad or anything that happened over Christmas break.  Keep in mind I feel like a failure who has let her down.  I know I have to stay strong for her but it's really hard to do.  
Addition I am not allowed to talk to her about it.  We are instructed not to mention his name.  Or anything that happens down there.  But as mom I feel like I need to do something.  Besides felling like I have art her up for failure.  Due to that I feel like I can't be the mom that I need to be too my children.  I just need help to get this all of this mess.