There had once been a very famous movie called Rain Man, which depicted the daily lives of people with this condition. But the film was somewhat exaggerated. People with such special abilities were extremely rare; many psychiatrists and psychologists went their entire lives without ever encountering one.
Bruce also knew a term: "born killers." It was not a psychological disorder, but a term from criminal psychology referring to those born without any pity for their own kind, incapable of comprehending social morality, and able to derive psychological pleasure from controlling and harming others.
Through countless bloody lessons, criminal behaviorists had concluded that such people were the most troublesome criminals, because they came infinitely close to having no motive for murder.
They did not kill for fame, profit, or even pleasure. Often, they killed the way someone decided to eat beef for dinner—there was no particular reason. They simply wanted to eat it.
The thought of killing arose in their brains just as naturally as the thought of eating beef. When that thought appeared, they were not constrained by humanity or morality, nor did it trigger any sympathy.
As a result, they often created the kind of random murder cases that gave investigators the worst headaches.
Their victims might have had no connection to them whatsoever. Everything could be a spur-of-the-moment decision, and after being arrested, they were almost impossible to reform. Like messengers of death wandering among mankind, they randomly selected lucky winners and ended their lives.
Bruce was not sure whether Schiller was that kind of person, but he had noticed that Schiller lacked even the most basic moral sense and pity when it came to harming others. The matter-of-fact way he treated it made Bruce feel that this might be an inborn mental disorder, rather than something caused