<P> The government is not permitted to appeal or try again after the entry of an acquittal, whether a directed verdict before the case is submitted to the jury, a directed verdict after a deadlocked jury, an appellate reversal for sufficiency (except by direct appeal to a higher appellate court), or an "implied acquittal" via conviction of a lesser included offense . In addition, the government is barred by collateral estoppel from re-litigating against the same defense, a fact necessarily found by the jury in a prior acquittal, even if the jury hung on other counts . </P> <P> This principle does not prevent the government from appealing a pre-trial motion to dismiss or other non-merits dismissal, or a directed verdict after a jury conviction, nor does it prevent the trial judge from entertaining a motion for reconsideration of a directed verdict, if the jurisdiction has so provided by rule or statute . Nor does it prevent the government from retrying the defendant after an appellate reversal other than for sufficiency, including habeas, or "thirteenth juror" appellate reversals notwithstanding sufficiency on the principle that jeopardy has not "terminated ." There is also an exception for judicial bribery in a bench trial . </P> <P> In Blockburger v. United States (1932), the Supreme Court announced the following test: the government may separately try and punish the defendant for two crimes if each crime contains an element that the other does not . Blockburger is the default rule, unless the legislature intends to depart; for example, Continuing Criminal Enterprise (CCE) may be punished separately from its predicates, as can conspiracy . </P> <P> The Blockburger test, originally developed in the multiple punishments context, is also the test for prosecution after conviction . In Grady v. Corbin (1990), the Court held that a double jeopardy violation could lie even where the Blockburger test was not satisfied, but Grady was overruled in United States v. Dixon (1993). </P>

What is the last clause of the 5th amendment