what the police should have done is arrested everyone in sight on the theory that any/all of them could be accomplices. so, no one on street, no cams, no problem.
what the guy filming should have done is get one of those neat new cameras that look like a hands free headsets and go james bond on their asses. no telling what they'll do/say if they don't know it's recorded.
what the da should have done is immediately drop the charges when they realized what asses they looked like, and further, send the arresting officers to some kind of training where they learn about media relations and so that...
let me work on that last one some more and get back to you.
what the state should have done is require mandatory chemical castration for all teachers (men and women) as a job requirement. this could have been easily sold to the public by pointing out that it is all about catching child predators.
what the schools should have done is set up web sites open to the parents, teachers, school, and students in order to allow the exchange of information in an open forum and required everyone to use it, on penalty of chemical castration
what the students should have done is claim every teacher in the building has molested them on multiple occasions. no particular reason, just for lulz.