"I'm a detective," the boy tells him simply. "My method is based on observation. On being able to walk into a crime scene and know what is out of place and what does not belong. But I'm worried that the fact that magic and these other energies exist here may affect my deductions. I need to know what is and isn't possible, and what evidence is left behind."

Because above all, he worried that not knowing something may end with his coming to a wrong conclusion on a case.