A lone traveller was walking across a marshy land at night. It was pitch dark, and he had only a flaming torch with him. He had no idea how long that will last. He needed to find a place to spend the night! Suddenly, he saw a faint glowing ball of light in the distance. He thought that he was saved and he can sleep for a long time as he thought it was an inn.
As he got closer, a sense of unease washed over him. There was something about the light that unnerved him. When he could see the source of light clearly, he saw the body of a man in a police uniform and screamed but the scream never left his mouth as the .765 calibre bullet sliced cleanly through his heart.
Detective Robinson King stood above the bodies on the autopsy tables with Nicole Vance, the medical examiner, and wondered who would hold a grudge against these two people, one a traveller and the other a retired police officer. These people didn’t know each other and there was not an iota of doubt about that. But there was something that seemed familiar about the traveller. Sean King, the retired police officer who was killed, was Robinson’s elder brother. Robinson couldn’t will himself to stop crying over the demise of his brother. Sean never left the small town lest the time when they went to California and Sean got a bad case of flu so it was impossible for him to know the traveller.
After Robinson got the details of the autopsy, his lieutenant, Harper, came running in and said that a letter from a person alleging to be the killer of the traveller and Sean. Robinson immediately went to his cluttered office and the envelope was waiting for him on his table. As soon as he opened the letter, he realized that the letter was coded.
The killer did not have any intention to live after what Sean King had done to ruin her life. She had to kill one more person and then she would have reached her goal. In the letter she had given a clue to who she is but the detectives would take a long time to figure out what she had written.
Robinson was wondering where the killer had gotten the code that the Zodiac (a serial killer in the US) used. He was lucky that he was shown those codes when he got a tour of the FBI in Quantico from his best friend Julie Getty. He immediately called her and asked her to send him those notes so he could figure out what the killer had written.
When he deciphered the code, there were only four letters: TEET.
Robinson was wondering why there are only four letters when it clicked in his mind why the traveller had seemed so familiar. He had given them the tip off that Nicole Vance’s brother was a serial killer and they had managed to corner him in an alley and he had been killed in the resulting shootout. Nicole had been upset but had come over the fact that her brother, John, was a serial killer and he had been killed. And then Robinson decided to do some digging on a fact that might give the answer to who the killer was.
The killer was gearing up for the last kill when the police burst into her house and arrested her. She was dumbfounded as to how the police got to know that she was the killer. Then Detective Robinson entered and she realized that he was the one who had found out her true identity by the smug look on his face.
After Nicole Vance was read her rights and taken to prison, Robinson’s colleagues asked him how he figured out that Nicole was the killer. He replied by saying that the letter had the name of a man: Teet Haerm. He was the medical examiner of a town and also a serial killer. That was the first clue to Nicole being the killer. After that, he looked into the death of Nicole’s brother and found out that Sean had shot the killing shot whereas Amos Robie, Sean’s deputy, had injured John first. He had then concluded that Nicole was avenging her brother’s death and then was going to suicide to be with her brother. He realized that she was going to suicide because Nicole hadn’t seemed to be herself fully after John’s death. She had already killed two of the main people involved in John’s death and she was going for the last person, Amos Robie.