Zhang Shuangyin is the deputy captain of the Technical Brigade of the Criminal Police Detachment of the Lianyungang Municipal Public Security Bureau. The name "Shuangyin" seems to be destined to belong to him. Fingerprints are handprints, and footprints can be called footprints. The combination of the two happens to be a double seal, and the name and his The nature of the work is also very consistent. In his 19 years as a police officer, Zhang Shuangyin has examined more than one million fingerprints, solved more than 4,000 cases, and cracked more than 300 major and major cases. Exploring evidence, identifying traces, and making final decisions, this "fingerprint detective" makes criminals unable to hide.
△"Fingerprint Detective" Zhang Shuangyin
Zhang Shuangyin was obsessed with fingerprint science when he was studying at Jiangsu Police College. After graduating from the trace inspection major in August 2004, he came to the Technical Squadron of the Criminal Police Brigade of the Donghai County Public Security Bureau to conduct fingerprint research. In the eyes of others, he enjoys work that is dull and boring. He wanders through the fine black and white lines and discovers countless secrets.
What really made Zhang Shuangyin feel the magic and sense of accomplishment of fingerprints in solving crimes was a case after 8 months of working. On the morning of April 12, 2005, the home of local resident Mrs. Liu was robbed. Seeing the old man's sad expression and expectant eyes, Zhang Shuangyin rushed into the fingerprint database after inspecting the scene and repeatedly analyzed a incomplete fingerprint extracted from the scene. After comparison, the suspect Xiao was successfully identified 4 hours later, and Xiao was captured on the same day. The case was quickly solved. The police not only recovered all the stolen gold jewelry that had not been transferred, but also solved more than 10 other theft cases.
△ Zhang Shuangyin at the investigation site
From that day on, how to find the real murderer from the incomplete fingerprints has become the topic that Zhang Shuangyin is most concerned about. No matter how dangerous or bloody the scene is, he is willing to work carefully and does not want to miss any clues. The night of May 7, 2016 was another sleepless night for him. A suspicious fingerprint extracted from the scene of the murder of two people in the scenic spot "1998.7.6" was placed on his desk. He calmed down alone and once again conducted an in-depth analysis of the case, using feature editing techniques and tactics. We repositioned every detailed feature point, marked the area in a centralized manner, and repeatedly submitted comparisons, and finally identified the suspect Che Moumou in the early morning. Not long after, the culprit, who had been hiding for 18 years after committing the crime, was brought to justice.
In March 2022, the Ministry of Public Security organized and carried out regular work on the backlog of murder cases. Zhang Shuangyin worked day and night and used technical and tactical methods to successfully crack the "2000.3.9" armed robbery and murder case in Haicheng City, Anshan, Liaoning Province. After the "6·10" case in Tangshan, Hebei Province, the Ministry of Public Security's working group in Tangshan made every effort to carry out investigation and rectification of key cases. From July 2022 to October 2022, Zhang Shuangyin worked sincerely with ministry and provincial experts and police officers to discover and crack the "1998.4 .20 Murder Case of Chang Mou", "Murder Case of Zhang Mou on February 13, 1995", etc. In this process, he continued to explore new special working mechanisms and effectively promoted the special work of Tangshan's backlog of homicide cases, pursuit of escapees, and gang-related and violent cases.
△ Zhang Shuangyin is comparing fingerprints
As the number of detected cases increases, Zhang Shuangyin pays more attention to figuring out the "temperament" of the automatic fingerprint identification system, constantly broadens his ideas, innovates methods, and finds the best combination of manual operation and computer comparison, becoming a global He is the only technical staff member in the province who has been involved in key cases of the Ministry of Public Security. In the practice of investigating and solving crimes, he explored and summed up 20 file investigation techniques and characteristic intervention methods, such as "zoning comparison method", "manual comparison method of cluster cases" and "regional comparison method", which he called "Zhang Shuangyin" "Fingerprint Working Method" has been promoted and applied throughout the province and nationwide. It has trained more than 5,000 technical police officers, cultivated a large number of outstanding professional and technical talents, and has had a significant and far-reaching influence and strong resonance in the field of fingerprints nationwide.
In 2010, "Zhang Shuangyin Studio" was established, and a fingerprint comparison team covering the entire city and affecting the entire province gradually grew. Driven by the studio, Lianyungang City has solved more than 10,000 cases through fingerprint detection, and more than 1,000 various influential criminal cases have been solved. For sixteen consecutive years, the Ministry of Provincial Supervision has supervised the handling of vicious homicide cases through fingerprint direct detection, and provided services for more than 1,000 homicide cases across the country through consultation, research guidance, characteristic mapping, and review and identification.
's hard work and professionalism have been recognized by more and more people.He has participated in fingerprint review consultations for more than 140 major homicide cases across the country and fingerprint review tasks for more than 1,000 backlog murder cases. He has provided key expert opinions for solving many difficult and complex cases, and provided guidance for correcting several erroneous identification conclusions and lifting criminal coercive measures in China. Technical Support.
△Zhang Shuangyin
He has been awarded honorary titles such as "National Advanced Worker" and "National Public Security System Level 2 Hero Model". He has been appointed as a criminal technical expert of the Ministry of Public Security and a senior first-level instructor of the provincial department... Zhang Shuangyin, who has a series of honors, has always adhered to them. In the fingerprint technology comparison position, I work conscientiously and quietly. Recently, he was awarded the honorary title of "The Most Beautiful Legal Figure" in Jiangsu by the Propaganda Department of the Provincial Party Committee.
Correspondent Lian Gongxuan Modern Express + Reporter Wang Xiaoyu Photo courtesy of Lianyungang Public Security Bureau
(proofread by Zhang Jingchao)
