Describe symbolism in Mindhunter: Inside the FBI's Elite Serial Crime Unit by John E. Douglas

The UNSUB is often symbolized as The Dragon in this work.

The Green River Killer is an unsolved crime that is symbolic of a fact of life in law
enforcement that "sometimes the dragon wins."

Fire-breathing dragon is the name of a metaphorical symbol that appears in a cartoon showing an evil dragon overcoming the good Knight. The caption on McCrary's cartoon states, "Sometimes the dragon wins" which is symptomatic of a continuing struggle the FBI and other law enforcement officials maintain in their battle with the evil behavior of criminals.