Nox was really unsettled by the idea that they were likely dealing with a demon. Seemed Hale shared his annoyance at the added difficulty of trying to catch a supernatural killer. They were such a pain. Made his job so much harder.
Listening as Hale talked to their witness, Nox stood aside slightly. He kept a keen eye on the crime scene workers who had just arrived, and he watched to ensure they did a good job. He put a lot of trust in them, and he was rarely disappointed, but everyone made mistakes. That's why everyone needed back up, that one extra person to watch out, catch those little slip ups.
He wasn't like Hale though. If he had a witness to talk to, Nox put all his attention on that person. It was good that he and Hale were partners for this reason, they made sure all the bases were covered.