My question involves education law in the State of: Louisiana

I am an educator and consider myself knowledgable in special education law. I work at an alternative school, and I very often see students placed at my school 45 days as an intervention, or because of a series of serious behavior issues. They write in the IEP that they will reconvene in 45 days to discuss progress. When the time comes, they find reasons to keep them here to the point that they ultimately spend the rest of the year at an alternative site.

It is my understanding that the only reason a special education student can be placed at an alternative location, or expelled, is if they commit a serious offense such as drugs, violence and weapons, and it is deemed that it is not a manifestation of their disability. Yet, here they are.

I am correct in this, and if so, how do I address it?