Sociopath and psychopathy (more commonly and scientifically Antisocial Personality Disorder) cannot be diagnosed until a person is 18 years old. The childhood equivalent (or precursor) would be Conduct Disorder, which is often seen with Oppositional Defiance Disorder.
My friends oldest son is diagnosed high functioning ADD, with severe ADHD, and probable Bipolar 1. He is just 11 or 12 now, so they are hesitant to diagnose the bipolar right now. But he did fit the criteria for ODD for a while. With therapy, and parenting changes, she was able to manage and help him with some off the worse behaviors. He was, however, nowhere near what "Toby" has done.
About Conduct Disorder:
https://en.wikipedia.org/wiki/Conduc...er?wprov=sfla1
Usually, I don't reference Wikipedia, but the author of this particular article did well and used a lot of references. Still, it is Wikipedia, so there is always the doubt of authenticity.