The standard of proof in the United States is typically preponderance of the evidence as opposed to clear and convincing or beyond a reasonable doubt. In Australia and the United Kingdom, it is 'on the balance of probabilities'. For this reason, it is often easier for a family to seek retribution against someone who kills a family member through tort than a criminal prosecution. It should be noted, however, that the two actions are not mutually exclusive; a person may be prosecuted criminally for causing a person's death (whether in the form of murder, manslaughter, criminally negligent homicide, or some other theory) and that person can also be sued civilly in a wrongful death action (as in the O.J. Simpson cases).