Doing magic in front of muggles...

[Ghoulish Delight]

The reality is, they don't have to, and didn't, say why he was fired. As a substitute, he's an "at will" employee and they can terminate him with no justification. And more than likely, the district's lawyers are telling them specifically not to say why he was fired because once they make a specific claim as to why, then they open themselves up to counter claims, whereas if they leave it at, "We don't need to give a reason," there's nothing the teacher can do. So yeah, the reporters went with the most ridiculous headline they could muster.