The case of O.J. Simpson, a former American football player, killing his wife before 1994 became the most sensational event in the United States at that time. The trial of the case was full of twists and turns at that time. Finally, because the Los Angeles police failed to strictly follow due process in the case investigation, a series of serious mistakes appeared, which made Simpson's lawyer team prove to the jury that Simpson is not necessarily the murderer with more sufficient reasons. It is very likely that someone forged criminal evidence and framed Simpson. Because the evidence is not enough to prove that Simpson is the person who committed these two first-degree murders, Simpson was found not guilty by the jury and acquitted by the court in the charge of killing his ex-wife and her boyfriend with a knife. In America, criminal and civil affairs are separated. Therefore, in the criminal trial, Simpson, suspected of killing his wife, won the case because the evidence was contaminated and the procedure was illegal. However, in the civil lawsuit, Simpson lost. The civil judge thinks Simpson is the murderer, so he has to compensate his wife and family, while the criminal judge thinks Simpson is innocent because of insufficient evidence. The civil judge draws a conclusion and makes a civil judgment according to the common sense of the evidence on the spot; The criminal judge ruled Simpson not guilty according to the absolute exclusiveness principle of criminal judgment. This is the difference in evidence requirements between criminal proceedings and civil proceedings. In criminal proceedings, because the defendant is going to be sentenced to restrict personal freedom or even deprive him of the right to life, the evidence must be exclusive and absolute before he can make a judgment, otherwise he can only be suspected of committing a crime. In civil litigation, because the judgment generally only involves monetary compensation, it can be inferred according to common sense. Therefore, whether a civil judgment is an objective fact cannot be absolute.