Typical cases are: the murder of Yunnan University dormitory on February 13, 2004, and the murder of Yin, a doctoral student at Beijing Institute of Technology on February129, 2004. Family poverty, introversion, reticence, disappointment for the future and strong frustration are the common characteristics of criminals in this kind of cases. Most of the victims are familiar dormitory students and lovers in love. The randomness of the case is strong, and contradictions in trivial matters and love may lead to the occurrence of the case.

2. Love killing caused by love and marriage disputes

Typical cases are: the murder case of female students imprisoned in the School of Tourism and Culture of Yunnan University on June 9, 2007; the murder case of teachers by students of China University of Political Science and Law on June 5, 2008; and the murder case of teachers in 2004.

65438 10/4, a campus murder occurred in a university in Nanjing. He came from other places because he suspected that his high school girlfriend had moved, and stabbed his ex-girlfriend to death on the spot. The criminals in this kind of cases are all college students, and most of the girls have the characteristics of rich family conditions, vanity and good looks, while the fatigue, helplessness and introversion of life are the same characteristics of male criminals.

3. Rape and kill at the sight of color

Typical cases are: 1996 65438+ 10/0, female college students were dismembered in a university campus in Nanjing, April 6, 2006.

The female doctor of the First Clinical Medical College of Guangzhou University of Traditional Chinese Medicine was robbed and raped and killed. A senior girl from a university in Nanjing was raped and killed in Tangshan Hotel in the eastern suburb of Nanjing four years ago on the eve of graduation in June. The victims of such cases are all female college students and doctoral students, and the criminals are mostly off-campus. Criminal motives are all emotional, and the most typical one is that criminals are robbing women.

The discovery of condoms in the doctor's handbag aroused the criminal's lust, so the robbery quickly turned into rape and murder. The circumstances of the crime are very bad. Killing is usually a criminal's choice after committing a crime, and dismemberment is an extreme after psychopathy. The worst case occurred in 1996. The victim was dismembered into more than 2000 pieces, of which more than 500 pieces were cooked. The case remains unresolved and becomes an unsolved mystery.

4. Passionate killing caused by family chores

This kind of cases mostly happen to newly married doctoral students and young teachers with high academic qualifications. A typical case is the case of Zuo Qihua, a doctor studying in the campus of Hebei Agricultural University, who killed his wife who was pregnant for 8 months on New Year's Day of 20 1 1. Thesis, professional title, housing and work are the same problems faced by newly married doctoral students and university green peppers. As the saying goes, you don't know when you are blessed, when poor couples face many contradictions in life such as daily necessities, soy sauce, vinegar and tea. Family conflicts are often caused by family chores such as financial difficulties, children going to school, supporting the elderly, and monthly housing payments. When their emotions are out of control, it is easy to cause a human tragedy of passion killing. During the trial, Zuo Qihua repeatedly blamed the murder case on the contradictions within the family caused by his wife's strong personality.