Since you were not present to witness what actually happened, then you don't know whether or not behavior modifications were in place. There is no cure-all behavior modification that works perfectly with every child; autistic or not. I sense that you are automatically going to blame the educator.
There are clear behavior modifications that should be in place for specific instances such as what occurred here. Any competent person who has worked with autistic children will tell you that, and would know how to handle a physical outburst such has this.
I know this because I understand autism. The “educator” and aide in this classroom clearly do not, and I would hope that is the case of the school district also for if they placed this child who is prone to this type of behavior in an inclusion setting without supports, knowing full well the potential ramifications of that would be then that is criminal and they should be charged.