Who is Richard Chase from Whoever Fights Monsters and what is their importance?

According to Ressler, Richard Chase is the prototypical disorganized killer. He came from a home where his mother and father continually fought, and where his mother accused his father of trying to poison her. Although he did well in school, his grades slipped when he began to act out and experiment with drugs. Over time, he became convinced that a gang of Nazis was poisoning him through his soap and that the only way to stay alive was to inject himself with blood. At first, he used the blood of animals, later the blood of human victims. After one attempt to inject himself with rabbit blood, he was committed to a mental hospital. He was eventually let out and began to live on his own.

Convinced that Nazis and UFOs were following him, he went out and bought a .22 rifle after his release from the institution. He randomly shot a man as he was driving down the street and then later decided that he needed to kill more. He wandered through Terry Wallin's neighborhood trying to open doors until he found an open one. Once he did, he entered and killed the woman, removed her blood and drank some. He walked down the street, opened the door to another house found a family inside, killed them all and took their blood before returning home.

Ressler helped find and arrest Chase and argued that Chase should go to a mental facility. The jury was not receptive to insanity defenses though and he was sentenced to jail. He later committed suicide by overdosing on the medication he was taking to reduce his hallucinations.