The law is the last bottom line that restricts people, when the moral boundaries begin to blur, people are easy to lose their basic sense of law, and at this time there are often some criminal acts, this kind of crime is an impulsive crime, and the judge of the criminal is also a person, as the so-called no one is perfect, and it is inevitable that people will make mistakes. 
In 1986, Li Huawei, a native of Yingkou City, Liaoning Province, married Xing Wei, a staff member of a food company, and soon after the marriage, his wife Xing Wei became pregnant, which was a double happiness, on October 29, his wife Xing Wei was pregnant for 6 months, and Li Huawei went back to take care of his wife in advance. Who knew that as soon as he got home, he saw his wife lying in a pool of blood, he instinctively picked up his wife, his clothes were stained with some blood, he almost desperately shouted to his wife, but there was no response, he immediately reported the case, according to the forensic examination, Xing Wei's body temperature is still 12 degrees, according to the speed of temperature passing, Xing Wei was killed at about 3 o'clock in the afternoon. 
Xing Wei had no other injuries on his body except for some knife wounds, and the arresting personnel immediately adopted a dragnet investigation, according to the knife wounds and the situation of the doors and windows, it should not be a stranger who committed the crime, and Li Huawei and his wife's classmates, neighbors, friends, and relatives have all been investigated. However, no relevant suspect was found, and Li Huawei, as Xing Wei's husband, was also investigated, and the arresters found some blood stains on his neckline, which according to forensic speculation, belonged to a kind of jet bloodstain, and Li Huawei became the first suspect. 
Li Huawei always said that he was wronged during the interrogation, but on the third day, Li Huawei changed his confession and admitted that it was his wife who killed. Ma Changsheng was sullen in his heart, but Li Huawei had already admitted that according to the verdict, Li Huawei was sentenced to death for "intentional homicide" with a one-year reprieve, Ma Changsheng didn't know how many times he went to prison in a year, but he didn't find clues, and a year later, Ma Changsheng didn't hear the news that Li Huawei was executed, so he found the vice president of the Yingkou Intermediate Court. 
The vice president was also investigating Xing Wei's case this year, and he felt that there were too many unreasonable things in it, so they changed the sentence to Ma Huawei to life, but the vice president Hao Ma Changsheng investigated for 14 years, until 2000, they found a person named Jiang Hai. Jiang Hai was arrested for a theft, during the interrogation, this Jiang Hai unintentionally confessed to a murder case, and the victim was Xing Wei, the year of the crime, Jiang Hai was only 17 years old, a sophomore in high school, he happened to drink a little wine that day, plus watched some "action movies", his brain was muddy. 
And Jiang Hai lived opposite Xing Wei, Xing Wei was very good-looking, Jiang Hai went to say hello, but it was difficult to suppress his emotions, which caused this consequence, Jiang Hai was too young at the time and did not receive much investigation, and Jiang Hai has always been burdened with a sense of guilt. It wasn't until he was arrested that he confessed that Li Huawei was acquitted, but 14 years of youth have passed, and Li's mother has become demented in 14 years, which can only be said to be too painful. After serving 14 years in prison for killing his wife, the judge was sorry and had arrested the wrong person