- Criminal trials (jury) -- when jury is sworn
- Criminal trials (judge) -- when first witness is sworn
- Does NOT attach in civil cases (or criminal proceeding for tax fraud)
- Jury is unable to agree on a verdict
- Mistrials for manifest necessity (Midway through D's trial, he has to go to hospital. It is not reasonable to keep a jury impaneled)
- Retrial after successful appeal
- Breach of agreed upon plea bargain by D (If D breaches an agreed upon plea bargain, his plea and plea sentence can be withdrawn and the original charges can be reinstated)
Separate Sovereigns Doctrine: Double jeopardy prohibition does not prevent dual prosecution by separate sovereigns. D can be prosecuted for the same criminal conduct by a federal court, then a state court or by 2 separate state courts. State and the locality are the same sovereigns.
Lesser included offenses: Being put in jeopardy for the greater offense bars retrial for the lesser included offense. Being put in jeopardy for the lesser offense bars retrial for the greater offense. (EXCEPTION: Trial for battery. V dies. Murder trial is OK)