Stop in for a cup of coffee

I know. That’s why I won’t go. I know the cops that are there and trust them to handle it. They have their own daughters in that school too.
First is your daughter's safety, and sounds like that is a GO.
Sounds like the school is stepping up and taking action....very positive
Depending on school policy the butt heads could be suspended for a period of time.
The police will complete their investigation. An Investigator might be assigned and your daughter may have to be re-interviewed.
She might remember things she forgot to tell the police. Have her write them down and forward it to them later.
Here the case is forwarded to the District Attorney and assigned to a Juvenile crimes prosecutor for review and charges.
In these type cases most are settled without having to testify in court. Of course you as a parent of a victim should have input into the settlement.
A verbal case like this, unless they are a prior offender will most likely be probation. Depending on how your state law is though, if it is a sex crimes charged, and IF the butt heads are found guilty, they MIGHT have to register as a sex offender until they are 21 or in some states age 25.
Knowing you I'm sure you and the wife will keep a close eye on her, and the case. Keep in mind if she has any problems you should consider counseling...JMO
As the father of three daughters, I understand their inner struggle of confidence no matter how strong they might be.
Keep us posted.