On March 24, 1992, a case of brutal killing of a female student Lin at the school occurred in the former Nanjing Medical College, Gulou District, Nanjing. With an unbroken responsibility mission and the development of modern criminal investigation technology and big data, the Nanjing Police, with its 28 years of perseverance and a "compulsory murder" police sentiment and pursuit, will bring suspects to crime on February 23, 2020 He Ma Gang (male, 54 years old, native of Peixian, Jiangsu, a driver of a company in Nanjing) was arrested.
On March 24, 1992, the Nanjing Police received an alarm from the former Nanjing Medical College, claiming that the student Lin of the school had disappeared after studying on the evening of March 20. On the afternoon of the 24th, Lin's body was found in the manhole in the courtyard of the school building. After forensic examination, the deceased was beaten to the head with a blunt device and raped, and then pressed into a manhole to die. After the incident, the Nanjing Public Security Bureau attached great importance to the mobilization of the police and the whole city. It dispatched hundreds of capable police officers to form a task force. It carried out large-scale visits and investigations for several months. It checked thousands of clues and visited the inspectors. More than 15,000 people, but due to the conditions at the time, the case did not make a breakthrough.
The "3.24" case that occurred in 1992 is one of the few major malignant cases in Nanjing and is still one of the nation's most influential killing cases. The mother of the deceased goes to Nanjing every March 24 or calls the public security organ to inquire about the progress of the case detection. For many years, the Ministry of Public Security has paid close attention to the case. The previous provincial public security department and municipal public security bureau party committees have always attached great importance to the case detection work. The main leaders and in-charge leaders have repeatedly given instructions and deployments to strengthen case detection. Deputy Provincial Governor and Director of the Provincial Public Security Department Liu Kun explicitly requested that the case be supervised; on the afternoon of February 19, 2020, the Deputy Director of the Provincial Public Security Department and the Director of the Nanjing Public Security Bureau Chang Heping specifically listened to the clues about the case. The report also called for the police's sentiment and pursuit of "the murder case must be broken" to fully resolve the case; the Criminal Police Corps of the Provincial Public Security Department organized a number of special consultations and studies. Several generations of criminal investigators of the Nanjing Public Security Bureau have always kept in mind the mission of "the murder case must be broken", and organized several rounds of project investigations. Detecting the "3.24" case as soon as possible, maintaining legal dignity, demonstrating social justice, presiding justice for the deceased, and giving family members an account are always the common aspiration and diligent pursuit of the goals of the Nanjing public security organs.
In recent years, in accordance with the unified deployment of higher-level public security organs, the Criminal Investigation Department of the Nanjing Public Security Bureau has launched special attacks on homicide cases, including the "3.24" case, and successfully broke through a number of accumulated cases over the years. In June 2018, combined with the province's murder case accumulation battle, the Nanjing Public Security Bureau further strengthened the attack on the case and set up a "3.24" murder case accumulation investigation leading group. Zhang Yong, deputy director of the Nanjing Public Security Bureau, was the team leader and the city public security The head of the Criminal Police Detachment Sun Yuhai and the political commissar Song Min served as deputy team leaders. The police were assigned to set up special working classes, fixed personnel, fixed venues, and centralized office. Detective work.
For more than a year, the task force has repeatedly convened symposiums and case studies involving previous comrades of the task force to review and sort out the investigations at that time, and to file and analyze more than 120 cases in the year. The task force took the initiative and dispatched police officers to more than 10 provinces, including Zhejiang, Jiangxi, Shandong, and Sichuan, and traveled nearly 20,000 kilometers. They carried out in-depth investigations on key personnel and checked the key personnel who had not been rejected in the past. At the same time, we will continue to communicate with brother units in the country, the whole province, and key provinces such as Henan and Anhui, and further analyze the case.
Tiandao paid diligence and the French Open. On February 19, the case made a major breakthrough. After in-depth application of the latest criminal technology, with the cooperation of Xuzhou police, it was clear that there was a major crime suspect among the family members of a family named Ma in Peixian. After receiving the report, in accordance with Chang Heping's instructions from the Deputy Director of the Provincial Public Security Department and the Director of the Nanjing Public Security Bureau, Li Mingjie, the Executive Deputy Director of the Nanjing Public Security Bureau, made the next detection request immediately. . The police of the task force immediately split into two routes. On the one hand, they rushed to Xuzhou for further inspections. On the other hand, they organized a visit to the family's personnel in Nanjing, and focused on those who meet the age characteristics of the suspect as further work. In the early morning of February 23, it was found that the DNA data of Ma Mougang, who lived in a community in Xuanwu District of Nanjing City, was completely consistent with the suspect, and he was suspected of major crimes. At 6 am on the 23rd, the police handling the case arrested him at the home of Ma Mougang. After interrogation, Ma Mougang explained the crime of rape and killing Lin in the former Nanjing Medical College 28 years ago.
According to the relevant person in charge of the Nanjing Public Security Bureau, the reason why the case could be resolved after 28 years is mainly due to the following three key factors: First, after the incident, the site inspection work was very careful and meticulous in that year, and key traces of physical evidence were retained. It has been properly kept so far, and has laid a solid foundation for the detection of today's case. The second is that the main and successive leaders of the Nanjing Public Security Bureau have always attached great importance to the case. Although members of the task force have been replaced several times, some have retired or even passed away. However, the receivers are always persevering, keeping an eye on it, and never breaking it; the third is due to the in-depth application of modern criminal investigation technology and the establishment of modern new mechanisms to combat crime, as well as the solid criminal foundation of the fraternal public security agencies under the leadership of the Ministry of Public Security jobs. The siblings provided by the victims on the Internet provided clues to solve the case, which are pure rumors. The public security organs collect evidence for handling cases in strict accordance with laws and regulations, and strictly protect personal information of citizens. During the investigation of the case, the task force did not receive any clues from the victims' brothers and sisters.