1. Case: Female college students disappeared after self-study at night. Now they are in Nanjing Medical University, formerly known as Nanjing Medical College. 1on the evening of March 20th, 992, Lin Ling (22 years old), an 88-year-old former student of Nanjing Medical College, disappeared after studying alone in the classroom at night. The management of the university is relatively loose, so there is no need to check in every day. Besides, students in Lin Ling's class are also facing graduation, and they are preparing their graduation thesis, so they don't have to go to class according to the schedule. In the first few days of his disappearance, Lin Ling did not attract the attention of teachers and classmates. She thought she had something to skip class or go back to her hometown. After she didn't go back to the dormitory for a few days and uncharacteristically didn't go to the evening self-study, teachers and classmates felt a little abnormal. After confirming the situation with her family, they reported the case to the police on March 24th.
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Female college students disappeared for no reason, which immediately attracted the attention of Nanjing police and quickly organized police to investigate at the school. After searching, the case handlers found Lin Ling's body in the manhole of the teaching building on the afternoon of the report. After forensic identification, the preliminary conclusion is that Lin Ling was injured and was thrown into the well afterwards, causing suffocation and death. That is to say, when the murderer threw Lin Ling into the well, Lin Ling was still alive.
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Second, the Nanjing police fully investigated the murder of female college students after being violated in the school. As soon as this case came out, it caused panic among teachers and students in Nanjing universities and had a very bad social impact. Nanjing police used a large number of police forces to carry out the investigation, and more than10.5 million people visited the investigators before and after. Even all qualified male teachers and workers were tested for DNA, and no suspects were found. During the investigation, Nanjing police also invited police portrait experts to draw a simulated portrait of the suspect according to the description of the school security guard, published it in the Yangtze Tribune and offered a reward in the newspaper. Finally, because of the lack of available clues, the murderer was not found and became an unsolved case.
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Every year on March 24th after Lin Ling's murder, that is, the date when the police found Lin Ling's murder, Lin Ling's parents would travel thousands of miles to the school to pay homage to their daughter, and then go to the criminal police to ask about the case. Lin Ling's parents insisted on paying homage, and they only hired the police for more than ten years, until Lin Ling's father died just over 60 years old. Father Lin is a senior engineer who enjoys special government allowance and won the second prize of National Science and Technology Progress Award. On his deathbed, he took his wife's hand and said intermittently, "The murderer has been caught. Write down the situation and burn it to me ..."
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Thirdly, DNA technology has been widely used in criminal investigation when accidental clues prevent the murderer from hiding the crime. Although DNA technology is powerful, it is not omnipotent. It needs comparable samples to be useful. At that time, the police investigating the case detected the suspect's DNA from the murderer's sperm extracted from the deceased, but there was no information about the murderer in the information base at that time, so it was impossible to compare the murderer. (Now, no matter whether it is illegal or criminal, as long as you are caught in the police station, you must take blood according to your fingerprints, one of which is to collect the DNA of the parties. )
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On February 2, 20201day, Nanjing police found that the DNA data of Ma X Xia, a man from Yuanlou, Pei County, was highly consistent with the data of 1992 female college students' murderers. Judging from the DNA of Ma X, the police found that the murderer was not Ma X, but he was closely related to Ma X. After getting this clue, Nanjing police did it one brace up, quickly organized police to investigate Ma X Xia's hometown, and extracted the oral swab of 1 1 man who met the age conditions of committing the crime. After overnight comparison, they were all ruled out!
Is there anything wrong with the DNA test? Nanjing police once again rushed to Peixian Yuanlou for more detailed layout. According to Ma X Xia's family, there is another member of their family named Ma X Wei. He joined the army and left his hometown more than 50 years ago and settled in Nanjing. He hasn't been in touch for decades. Nanjing police investigated Ma and found that Ma had a son named Ma Jigang, 54 years old, which was in line with the age of the suspect. The police quietly extracted Ma Jigang's biological ticket and sent it to the DNA laboratory for typing identification. The results are completely consistent with the DNA typing of the lower body swab of the deceased. At 7 o'clock on February 23, after Nanjing police arrested Ma Jigang, this person recognized it at that time! ?
According to Ma Jigang's account,1at 22 o'clock on March 20th, 1992, he went to the former campus of Nanjing Medical University, and found that Lin Ling was studying alone in the classroom in the south building of11,that is, he stepped forward to strike up a conversation. After being rejected by Lin Ling, he forced to have sex with Lin Ling with an iron bar at the entrance of the East Hall on the south side of the teaching building. Later, for fear of being exposed, Ma Jigang dragged Lin Ling to a manhole under the window of the teaching building on the north side of the hospital, put Lin Ling head down into the manhole, covered the manhole cover, and put Lin Ling's schoolbag, books, clothes and other personal belongings into another manhole next to it. After committing the crime, Ma Jigang fled the scene when he was questioned by members of the school guard because of his suspicious behavior. On March 24th of the same year, the body of the victim Lin Ling was found in the Military Commission. It was identified that the victim, Lin Ling, was hit on the head by others with a blunt instrument, resulting in craniocerebral injury, mechanical asphyxia caused by drowning and death.
Ma Jigang, male, 54 years old, lives in Shigu Road, Nanjing and works as a driver in a foreign company in Nanjing. In the eyes of colleagues and acquaintances, Ma Jigang is kind and honest. The family is happy, the wife is virtuous and the daughter has gone to college. No one expected that this man turned out to be the murderer who raped and killed college students 28 years ago. After Ma Jigang was arrested by the police, he was the last to let his daughter know the fact that he raped and killed. According to his confession, since he had a daughter, he regretted his crimes.
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Four. Sentenced to death June 65438+10/October 65438+April 2020, Nanjing Intermediate People's Court publicly pronounced the case in the first instance according to law, sentenced to death for intentional homicide and deprived of political rights for life; He was sentenced to seven years in prison for rape, decided to execute the death penalty and deprived of political rights for life. After the verdict was pronounced, Ma Jigang appealed. 202119, Jiangsu Higher People's Court ruled in the second instance that the appeal was dismissed, the original judgment was upheld, and it was reported to the Supreme People's Court for approval according to law. 10 In June, following the execution order issued by the Supreme People's Court, the Nanjing Intermediate People's Court executed Ma Jigang, a murderer and rapist, according to law.
Written at the end: If she hadn't been killed, this senior girl who won the first prize for four years in a row would be an excellent doctor today! Good and evil will eventually be rewarded, and heaven will cycle. If you don't believe me, look up. Who will Heaven spare?