On May 7, 2016 (April 1, 2016 in the lunar calendar), Lei Yang was charged with "engaging in prostitution" and died. On the evening of May 7, 2016, Lei Yang, a 2009 master's degree student at the School of Environment of Renmin University of China, died after leaving home. Changping police reported that during the investigation and handling of the pedicure shop, the police controlled Lei, who was "suspected of whoring," and brought him back for review. During this period, Lei suddenly felt unwell and died after being rescued. Introduction Lei Yang is from Li County, Hunan Province. He is an undergraduate and master's student at the 2005 School of Environment of Renmin University of China. He once worked for China Circular Economy Association. After graduating in 2012, Lei Yang worked for China Circular Economy Association. He has participated in the preparation of multiple industrial park plans, ecological civilization plans, pollutant treatment plans and circular economy plans. He has published papers in the environmental protection journals Environmental Protection, Environmental Science and Environmental Engineering. Character incident On May 7, 2016, since Lei Yang and his wife had just given birth to a daughter, their relatives wanted to come to Beijing to visit them, and the flight was expected to arrive at 23:30 that night. At about 21:00 that night, Lei Yang went out from home to the Capital Airport to meet relatives. After that, Lei Yang lost contact. At about 20:00 on May 7, 2016, Changping police organized plainclothes police officers to carry out investigations in response to clues that there was a problem of prostitution in a pedicure shop in a community in Huoying Street. At 21:14 on May 7, 2016, the police discovered that Lei had left the pedicure shop and immediately followed up and identified him for questioning. Lei tried to escape and bit the policeman during fierce resistance. The video shooting equipment held by the police was knocked down and damaged, and was then taken to the car. While driving, Lei suddenly broke free from guard and jumped from the back seat of the car to the front co-driver position. He kicked the driver and forced him to stop. He opened the door to escape, and was controlled again. On May 7, 2016, Lei fought fiercely. In order to prevent him from escaping again, the police handcuffed him in accordance with the law and took him to the car at 21:34. On the way back to review, Lei was found to be unwell and in an abnormal condition. The police immediately sent him to the nearby Changping District Hospital of Integrated Traditional and Western Medicine. He was admitted to emergency treatment at 22:5. Lei died at 22:55 after rescue. At 1 a.m. on May 8, 2016, the family received news from Changping Dongxiaokou Police Station and asked relatives to rush to the police station. After they arrived at around 1:30, they were told that Lei died of a heart attack while being taken to the police station by a police car on suspicion of prostitution. Lei was taken to the hospital at 22:09 pm on May 7 and was dead when he arrived. At 4:30 a.m. on May 8, 2016, relatives saw Lei's body and found obvious congestion on his arms and head. Police said that Lei had resisted strongly on the way and hit his head when jumping out of the car, resulting in injuries. On the evening of May 9, 2016, Lei Yang's wife confirmed the matter and had hired a lawyer to intervene in the matter, hoping to be resolved fairly. Incident investigation On the evening of May 9, 2016, Changping police reported the incident that at about 20:00 on May 7, Changping police received a report from the public that there was a problem of prostitution in a pedicure shop in a community in Huoying Street, Changping District. After receiving the call, the police quickly carried out investigation and punishment in accordance with the law. Six people suspected of prostitution were found in the pedicure shop that night. During this period, when the police brought a man suspected of prostitute Lei Mou (29-year-old, native of this city) back for review, the man resisted law enforcement and attempted to escape. The police took compulsory restraint measures against the man in accordance with the law. During the process of bringing the person back to the public security organ for review, the person suddenly felt unwell, and the police immediately sent him to the hospital, where he died after being rescued by the hospital. The police informed that in order to further investigate the cause of Lei's death, a third party will be entrusted to conduct an autopsy under the supervision of the procuratorate in accordance with the law with the consent of the family. On November 29, 2016, the Fourth Branch of the Beijing City People's Procuratorate concluded the investigation into the suspected dereliction of duty case involving five suspects including Xing Moumou, Kong Moumou, Zhou Moumou, and Sun Moumou, and transferred them to the public prosecution department for review in accordance with the law. The suspects Kong Moumou, Zhou Moumou, Zhang Moumou, and Sun Moumou were released on bail pending trial. On December 23, 2016, the People's Procuratorate of Fengtai District, Beijing City, made a decision not to prosecute five police officers involved in the case of dereliction of duty, including Xing Moumou, Kong Moumou, Zhou Moumou, Sun Moumou, and Zhang Moumou. After review by the Fengtai District People's Procuratorate in accordance with the law, it was found that on the evening of May 7, 2016, according to the special action deployment of the Changping Branch of the Beijing City Public Security Bureau, Xing Moumou, then deputy director of the Dongxiaokou Police Station, led police officer Kong, auxiliary police officer Zhou, and security guards Sun Moumou, Zhang Moumou and others carried out plainclothes squatting and strike missions near the Shehuang Pedicure Health Store on Longjin Third Street, Changping District. At about 21 o'clock that night, Lei was discovered by Xing Moumou and others when he left the pedicure health store located at No. 23-13 Longjin Third Street receiving paid sexual services. Suspecting that Lei was engaging in prostitution, Xing Moumou and others immediately chased after him, revealed their identity as a police officer, and conducted an investigation. Because Lei tried to escape, he intercepted him and fell down with his waist. During the process of subjugating and controlling Lei, Xing Moumou and others used his arms to surround his neck, suppress his neck and face with his knees, press his limbs, and slap his face. Later, Xing Moumou illegally arranged for Zhou and Sun Moumou and Zhang Moumou to drive and escort him independently. When the vehicle reached the turn on the west side of the T-junction in the south gate of Longjinyuan East Fifth District, Lei tried to jump out of the car and escape and shouted to break free. Xing Moumou and others once again subdued and controlled Lei, used handcuffs to restrain him, and once again revealed their identity to Lei. During this period, Xing Moumou and others implemented behaviors such as stepping on the neck and face and forcibly dragging Lei into the car, causing Lei to change his position many times. Later, Lei became paralyzed and no longer shouted to break free. Xing Moumou and others did not promptly provide on-site first aid, emergency call for help and sent him to the hospital for rescue after discovering that Lei was abnormal. When he was sent to the hospital for emergency treatment, he had no vital signs and was declared dead at 22:55 that night. After appraisal by a entrusted judicial appraisal agency, Lei was consistent with the death of suffocation caused by the inhalation of gastric contents into the respiratory tract before death; the formation of inhalation suffocation in this case cannot be ruled out due to external forces and strenuous activities during the law enforcement process. Changes in body position and other factors. After the incident, Xing Moumou made false statements in an interview with the media, arousing public doubts, and deliberately fabricated facts and concealed the truth with four other police officers involved in the case to hinder the investigation.