Point of clarification. He is not a sociopath, but possibly a psychopath. They share many symptoms except that a "sociopath" is totally disorganised in their thinking process where a "psychopath" is obsessively in control.

This man is in total control of what is going on with absolutely no remorse other than for being "caught" and he managed to avoid a lot of that by confessing. Much like the "quit before you're fired" maneuver.