The prohibition against double jeopardy bars the government from prosecuting the same person for the same offense more than once. For the most part, a defendant has technically been placed in jeopardy—that is, jeopardy has “attached”—at the moment the jury is sworn in. But the empanelling of
The prohibition against double jeopardy prevents the government from trying a defendant more than once for the same crime. But determining when a defendant has been placed in "jeopardy" can be difficult. In many cases, the prosecution can drop charges through dismissal or nolle prosequi before jeopardy
About that movie, Double Jeopardy -- I have a feeling the entire premise is false. It shows a woman trying to shoot her husband in a public square, supposedly safe in the knowledge that since she's already (but wrongly) been convicted of his murder, she can't be prosecuted for it again. And another thing: Could she have been found guilty of the murder the first time around in spite of the fact that no body was ever found?