Placement Change

My son Grant is 7 years old and in first grade. He has ADHD, anxiety, and PDD. He had an episode at school last Thursday and they put him on an administrative leave. They said he can't come back until we agree to place him in an ED classroom full time. I am afraid that his IEP is not being correctly implemented and that they just want him gone. We met on Friday and we asked that we try some more options before changing placement. They had their minds made up and would not entertain any suggestions. Do we need to hire an attorney?