Need statistics on child sex abuse in United States?

I need some help with statistics. I am meeting with principle of high school about a pervert who got to go on a band bus despite the fact that he had no kids on bus. He kept harassing the girls, and finally kissed one on mouth without her consent. She was 16. He is 23, and had no business on bus at all. I want to use stats to press upon these people how important it is to take this seriously and be more vigilant.

Seems like I heard one day that 1 in 4 girls and 1 in 10 boys are molested before the age of 18. Any one know the stats?

Furthermore, what charges should be pressed by girl's mom? What do you call it?

Thanks