What are some real-life examples of double jeopardy?

Double jeopardy is a legal concept that prevents a person from being tried or punished twice for the same crime. A real-life example of double jeopardy would be if someone was acquitted of murder in a criminal trial, they cannot be tried again for the same murder in a different court. Another example would be if someone served their sentence for a crime, they cannot be tried again for that same crime in the future.