According to the police, on April 1 1, Wenbao Branch of Shanghai Public Security Bureau received an alarm from the security department of Fudan University, saying that Huang, a graduate student of Fudan University Campus on April 1, was unwell after drinking the water from the drinking fountain in his dormitory, and was in the hospital for rescue.
After receiving the report, the Shanghai police immediately set up a task force to carry out investigations. After on-site investigation and investigation, it was locked that Huang's roommate Lin was suspected of committing a major crime. That night, Lin was criminally summoned according to law. On April 12, Lin was criminally detained by the police according to law.
According to a preliminary investigation by the police, Lin was dissatisfied with Huang because of trivial matters in life. After pre-planning, at noon on March 3 1, he took the highly toxic compounds left in his laboratory to the dormitory and injected them into the water tank of the water dispenser. On the morning of April 1 day, Huang developed poisoning symptoms after drinking water from the drinking fountain, but died on April 16 after being rescued by the hospital.