The man died six days after leaving the police station. Why was this man detained by the police station?

Recently, in 2005, a hotel owner was brought back by the police for interrogation and died six days later, which attracted the attention of netizens. At that time, five policemen were involved in the case. After the incident, after investigation and interrogation by the public security organs, the five policemen were sentenced to different terms of imprisonment by the Hengyang County Court. On July 9, 2020, one year after he was released from prison, He Mou, a policeman involved in the case, and another family member of Xu Mou, a policeman involved in the case, filed a complaint with the local higher people's court for retrial. What was the situation at that time? Only by understanding can we know. 2065438+In August 2005, He Mou, Xu Mou and other colleagues made an inventory of the business premises. They visited a large local hotel at that time. The deceased in this case was Wu Mou, who was in charge of the hotel at that time. Because before He and Xu went to check, other policemen had already checked once. Wu Mou thought they had checked it again, and they went to check it again, deliberately going to their hotel to make trouble. So He Mou, Xu Mou and others didn't have a good attitude during the hotel inspection, and they also clashed with the police. The scene was a bit difficult to control. Xu and others brought them back to the police station. Xu Ben wanted to take him back to the police station to communicate well. Unexpectedly, his attitude was very bad and they quarreled. That night, Wu Mou told his wife that she was beaten by five or six policemen at the police station. Six days after leaving the police station, Wu Mou died because of ineffective rescue. The five policemen involved didn't know the news until ten days after Wu Mou's death, when they were taken to court by Wu Mou's wife. Wu Mou's wife said that Wu Mou has the habit of exercising regularly and has always been in good health. It is believed that her husband's death is directly related to being beaten by them in the police station before. Moreover, the forensic doctor identified Wu Mou with multiple injuries, and the main cause of death was pericardial tamponade caused by trauma. However, He Mou, a policeman who was recently released from prison, said that no one had beaten him at that time, and the confession of that year was not true. What is the truth? I believe that the law will give a fair trial.