Dr. Huang: I'm conflicted about labeling a ten year old a psychopath. But...
Don Cragen: "But"?
Dr. Huang: I've had a chill like that two times in my life. With death row serial killers.
As the detectives are trying to find out from Doug Hutchinson's character where the victim is being held, the detectives find out he is somewhat claustrophobic. They decide to scare him and put him in a cupboard without any light. This is very similar to Doug Hutchinson's character in The Green Mile. The main characters decide to punish him and force him into a dark and small room.