I have a student whose behavior has escalated in the past month to now hitting other children around 15 times per day on average (also yelling/screaming, running away, and taking toys from others). He is 4 years old and in a general education classroom of 20 children. I have been told by my administration that nothing can be done, and that I should continue to keep data and keep him constantly isolated from any other children the entire day. I have a small room of 20 children who participate in center time for the majority of our day, so there are always children in all areas of the room. I have a paraprofessional so one of us is always intervening, but even though the other children are scared of him, they're 3-5 year olds and they don't instinctively stay away, they need to be repeatedly told. The student's attacks on the other children are almost always unprovoked, and no child is off limits. The student displays no remorse or understanding that what he is doing is wrong. He shows no signs of empathy. No negative consequences, including time outs, loss of privileges, notes home, loss of toys playing with, etc. affect him at all. I will put him in time outs, but more to give the other children a break. I have yet to find a positive reinforcement to motivate him to reduce his hitting, and many reinforcements have been attempted. He says phrases such as "I'm going to punch my mom" or "my parents don't love me anymore" or "they're going to kill me", but the child comes from a loving, two-parent home. He often appears to take pleasure in physically lashing out for no reason. I drive home in tears, because my heart is breaking for my other students, who are getting hurt daily and have said that they don't feel safe. I have seen more interventions done by administration and support staff for other previous students whose behaviors were much less significant than this. I feel like I'm being blown off, given excuses by people who don't truly understand the extent of the student's behavior and won't try to. I was told that there will be other students who will have worse behaviors in these, yet in my years of teaching, including teaching SpEd and BD children, I've never experienced anything else like this, with a child who has no triggers, no remorse, and no response to positive or negative consequences. I'm trained in working with children this age with special needs and trained in deescalating behaviors, but this student needs more help than what I am currently able to give him in a room of 20 children.