Ok, I think I've got the temperature here.
Good to know.
(The visits are disciplinary, punitive, and generally Not Good (tm))
They rarely happen with the main teacher, but I sometimes get the feeling she is being pressured by others to send him.
I'm going to pursue a note in the IEP that intervention is required to prevent situations where his stimming reaches a level that makes removal from the classroom necessary, and that, when required, a suitable quiet space with intellectual and social stimulation be provided to help him regain control.