Half of the Promised Group of Detectives Are Actually Perverts?

The serial skinning case shocked the whole city. The murderer's technique can be called "artistic". There were no fingerprints or hair at the scene, and even surveillance was perfectly avoided. The experts from the provincial department were helpless, the criminal investigation team leader became red-eyed, and the case completely turned into a dead end. Just when everyone was despairing, the trainee police officer Jiang Yan in the corner silently took out his mobile phone and opened a chat group called [Eternal Mystery Case Research Society]. Jiang Yan: "@All members Dear bosses, this case is really a dead end, there are no clues at all!" [Pipe in Baker Street]: "Stupid police officer. Looking at the cut on the body, the murderer is left-handed and suffers from severe obsessive-compulsive disorder." [Song Dynasty's Mention of the Punishment Officer]: "Young people, don't panic. Wash the corpse with vinegar, and the marks of strangulation on the neck will appear!" Just when Jiang Yan thought he was stable, the mood in the group suddenly changed. [Elegant Ogre]: "A rough imitator! He took away the skin but left the most delicious liver? Go check out the most high-end underground art auction in the city, where the murderer displays his 'trophies'." [Fog City Surgeon]: "Fart! This incision was clearly made with an animal boning knife. Go check the abandoned slaughterhouse in the south of the city immediately. That idiot must have flushed the internal organs into the sewer!" [Napoleon in the Criminal World]: "Jiang Yan, turn around and look outside the cordon. The man in a black trench coat drinking coffee is the murderer. He is admiring the police's incompetence." Jiang Yan looked at the detectives and perverts in the group who were arguing over providing clues, and sighed helplessly: "How come half of the agreed-upon detectives are perverts?"