With one exception, the prosecution in the United States cannot appeal an acquittal because of constitutional prohibitions against
double jeopardy. The
U.S. Supreme Court has ruled: :If the judgment is upon an acquittal, the defendant, indeed, will not seek to have it reversed, and the government cannot.
U.S. v. Sanges, 144 U.S. 310 (1892).
Ball v. U.S., 163 U.S. 662, 671 (1896) :A verdict of acquittal, although not followed by any judgment, is a bar to a subsequent prosecution for the same offense.
Ball, supra, at 672. :Society's awareness of the heavy personal strain which a criminal trial represents for the individual defendant is manifested in the willingness to limit the Government to a single criminal proceeding to vindicate its very vital interest in enforcement of criminal laws.
United States v. Jorn, 400 U.S. 470, 479 (1971) :Whether the trial is to a jury or, as here, to the bench, subjecting the defendant to postacquittal factfinding proceedings going to guilt or innocence violates the
Double Jeopardy Clause.
Smalis v. Pennsylvania, 476 U.S. 140 (1986) It was decided in
Fong Foo v. United States, 369 U.S. 141 (1962) that the prosecution cannot appeal a judgment of acquittal by a jury. In
United States v. Jenkins, 420 U.S. 358 (1975), this was held applicable to
bench trials. In
Arizona v. Rumsey, 467 U.S. 203 (1984), it was ruled that in a bench trial, when a judge was holding a separate hearing after the jury trial, to decide if the defendant should be sentenced to death or
life imprisonment, the judge decided that the circumstances of the case did not permit death to be imposed. On appeal, the judge's ruling was found to be erroneous. However, even though the decision to impose a life sentence instead of death was based on the judge's incorrect interpretation of the law, the finding of life imprisonment in the original case constituted an acquittal of the death penalty. Thus, death could not be imposed upon a subsequent trial. Even though the acquittal of the death penalty was erroneous in that case, the acquittal must stand. The only exception to an acquittal being final is if the defendant was never in actual jeopardy. If a defendant bribes a judge and obtains acquittal due to a bench trial, the acquittal is invalid because the defendant was never in jeopardy in the first place.
Harry Aleman v. Judges of the Criminal Division, Circuit Court of Cook County, Illinois, et al., 138 F.3d 302 (7th Cir. 1998). An acquittal, while conclusive as to the criminal law, does not necessarily bar private
civil actions in
tort or on some other grounds as a result of the facts alleged in the charge. For example, the
City of Los Angeles was held liable in 1994 for the 1991
Rodney King beating despite state acquittals in 1992 of all of its four main
LAPD defendants, and in 1997
O. J. Simpson was held civilly liable for
wrongful death even after being tried and acquitted in 1995 of
murder. An acquittal also does not bar prosecution for the same offenses under a statute of a different jurisdiction. For example, in the United States, someone acquitted of a state murder charge can be retried for the same actions on a federal charge of violating
civil rights, and police acquitted of a state charge of felonious assault, as in the Rodney King case, can likewise be tried on federal civil rights charges. == The effect of acquittals on criminal records ==