Was he adopted, maybe at an older age, or neglected or abused by a parent as a child age infant to five? An early divorce and loss of one parent? Not one consistant carever but many??
This can cause reactive attachment disorder which many doctors know nothing about and is very hard to treat. It is basically a child whose needs were not met by a consistant loving caregiver at a young age so the child did not learn attachment. And cant attach. He was left to himself and learned not to expect others to tend to him. And therefore people dont matter to him so he violates their rights and is only concerned with #1. Himself.
They act like psychpaths but are kids. They feel no empathy, remorse, and dont listen to anyone.