That's a crock. People don't speak up because they either don't have proof or they are cowards. Anyone who knew this was happening (if it's proven to have happened) contributed to it going on longer than it had to.
That's a plain and simple fact. I do applaud those who stepped to the plate now. Justice can't be served unless a public is willing to participate in the process.
And this is not the first case of an educator violating the trust of the public and students. It's happened in districts near us as well as this one.