In the sensational murder case of Nicole Brown, ex-wife of former NFL star O.J. Simpson, blood at the crime scene was matched to Simpson's through DNA analysis. The defense lawyer, however, succeeded in getting the evidence thrown out of court. The defense contended that the blood sample had been contaminated on its way to the laboratory, and further claimed that the police had collected the evidence illegally in the first place.
轟動一時的美國足球明星辛普森前妻被殺案，案發現場的血跡經 DNA 檢定，雖屬辛普森所有，但是最後在辯方律師提出，在血液送交實驗室化驗時，DNA 的檢體已經受到汙染，以及警方採證的法律程序有問題之下，不被當作採證的犯罪事實。