I am aware that it is customary for Law Enforcement to notify a school district if one of its employees is arrested or, in cases where no arrest is made, that information is available that may raise an issue as to the suitability of that employee to work with,children. This comes up frequently in drug investigations and, in the past, when the issue of homosexuality was raised.
Certainly, if a teacher were suspected of abducting and murdering a child, law enforcement would release to the school district enough of what evidence they had so that the district could deal with the situation fully informed. While there might not be sufficient evidence to terminate the teacher, there are other ways to deal with a potential problem. If such action were being undertaken by the district, DR's work life would be very unpleasant and the media would easily get wind of it.
To my knowledge, except for requiring a second adult in his class room for a few days (I don't know how long this lasted), DR has pretty much gone back to business as usual an he claims to have the support of his students, parents, fellow teachers and administrators. Is this impression accurate?