How could she have had him removed?
The article says he's spent most of the year in the principal's office for misbehavior, and had just been sent back from there when this incident occurred.
How would the teacher have gotten this child removed, and where would he have gone instead?
Nothing justifies they type of humiliation to which the kid was subjected.
Now the child is removed, so I guess the teacher found a way.
In the meantime, the child will remember this the rest of his life. If he isn't fully anti-"socialized" by now, he is probably well on his way at the ripe old age of five.