sabby, a couple of a questions - are you in the USA? does the boy have an IEP?

If he does have an IEP and he acts out with inappropriate behavior the school (if it is a public school) is required to have a meeting to determine if the behavior was a result of his disability. If it is the result of the disability then they cannot kick him out of school but must develop a plan to help him. If the behavior is not a result of his disability then they can kick him out of school or send him away with police.