Seeking the name of a mystery novel

This novel shouldn't be very famous. I read it in a mystery magazine. The story was about the university dormitory in the 1980s and 1990s. Not long after school started, a classmate died mysteriously, and then someone else died. Everyone confirmed that the murderer was a classmate from the dormitory. The students in this dormitory were affected by these things, and their university was not very smooth. One of them dropped out of school. However, the protagonist did not give up on the investigation. It took him ten years to understand the truth. It turned out that a classmate had been killed on his way to the university. The person who killed him was a fugitive. Later, the fugitive changed his identity and pretended to be a victim to report to the university. They had been classmates for four years. The reason why he killed those students was because one of his roommates was in the same city as the first student who was killed. Coincidentally, the two of them had interacted before they went to junior high school. The murderer was afraid that his identity would be exposed. After graduating from university, the murderer killed another roommate who was under investigation and changed his identity again to live in a foreign land. Please tell me the name of this novel ~

Answer 1

The name of one of the mystery novels was Murder of the Green Toes. This was a masterpiece by Christie of the United Kingdom. It told the story of a mysterious person who revealed the truth of a murder case step by step by making the victim wear green toes. The plot was compact and the characters were vivid. It was hailed as one of the classics of mystery novels in the world.