Moon Phase Murder

Lancheng, a southern city soaked by continuous winter rain, for three consecutive months, every time the moon phase changed, a corpse appeared in an "impossible" way. On the night of the new moon, Li Chongyang, the former financial director of Mingyuan Trading, died of acute myocardial infarction. There was a ring on his finger that did not belong to him, with the word "Song" engraved on the inner ring. On the night of the first quarter moon, former deputy general manager Zheng Guoliang drowned in a bathtub 30 centimeters deep, and his work badge was immersed in a red wine glass. On a full moon night, former legal consultant Zhou Qiheng had his carotid artery cut and was sitting on a chair in an abandoned warehouse with an old work badge with his name blacked out on his chest. The three deceased people did not know each other, but they pointed to the same name: Song Mingyuan - the general manager of Mingyuan Trading who disappeared late at night a year ago and was neither alive nor dead. Criminal investigation team leader Lin Mo was ordered to do something in danger. This criminal policeman, who is known for his silence and insight, discovered a secret that he could not tell others when the case reached a deadlock: Song Mingyuan was his high school classmate. He had called him three times before he disappeared, but he did not answer any of them. Fang Qiao, a criminal psychology consultant, made a shocking judgment after analyzing the scene: the murderer was not killing people, but "exhibiting". He used the moon phases as a countdown clock and carefully arranged death scenes as exhibits. Each corpse was a challenge to the police. What's even more chilling is that the technical department discovered that the three deceased received mysterious phone calls that lasted exactly 19 seconds before their deaths. The base station positioning of the three calls formed a perfect equilateral triangle on the map, and the center of the triangle was the alley where Song Mingyuan finally disappeared...