About Double Jeopardy

Double jeopardy is a procedural defense that forbids a defendant from being tried again on the same charges following a legitimate acquittal or conviction. In common law countries, a defendant may enter a peremptory plea of trefoils acquit or trefoils convict, meaning the defendant has been acquitted or convicted of the same offence and hence that they cannot be retried under the principle of double jeopardy.