Asst. Teacher hit my 3 yr old in face, now has Post Traumatic Stress Disorder.

Asked in Knightdale, NC - 9 months

My 3 year old son is in special education preschool at a elementary school, this is his first year. The Asst. Teacher smacked him in the face, she claims she accidently hit another boy... who cant talk to explain anything. But 1 month later she retired early. Now my son was diagnosed with Post Traumatic Stress Disorder and the principal wants me to let him return back to school however she says if he's crying and not cooperating that she'll have a man and woman staff member there in her words " to peel my son off of me, so I can run to the car" this class is only preschool and mon -thru from 8:15 to 11:15 am. What should I do? MY son's pediatrician has him starting to go to therapy with a psychologist and wants him to stay away from that school right now.