No, fraud involved and not a "protected computer"
Computer Fraud and Abuse Act. If it's involved in interstate commerce, it is a "protected computer" under the CFAA. Facebook, and by extension any computer connecting to Facebook, is a protected computer under the act since it is in the business of interstate commerce.
Now about the fraud. Actual fraud isn't needed, CFAA makes it a crime for anyone who "(2) intentionally accesses a computer without authorization or exceeds authorized access, and thereby obtains ... (C) information from any protected computer"
They used duress (cop and admin there forcing her) to exceed their authorization to obtain information from Facebook (a protected computer). CFAA charges should be filed. And since more than one person was involved, a conspiracy charge should be added.
Did the school employees ever agree to the Facebook TOS? No evidence of that.
If they were using Facebook, then they agreed. Otherwise, they were accessing the sytem without agreement, which could be unauthorized access. Facebook TOS:
3. Safety
5.You will not solicit login information or access an account belonging to someone else.
6.You will not bully, intimidate, or harass any user.