DETROIT (AP) — The superintendent of a Michigan elementary school in which a student with Asperger’s syndrome was videotaped while stuck in a classroom chair says the teacher who recorded the footage ridiculed and humiliated the boy.

Goodrich Area Schools Superintendent Scott Bogner’s comment appears in a letter he sent to the Flint-area district’s board in January.

The Associated Press on Friday obtained a copy of the letter, which details the findings of Bogner’s investigation into the events of Nov. 22 in fifth-grade teacher Nicole McVey’s Oaktree Elementary School classroom.

Bogner says McVey shared the footage with the class as well as teachers and staff, actions he calls “particularly callous.”

Messages were left with McVey’s lawyer, William Young, who says in a filing that his client didn’t take the video “for malicious purposes.”