What are the implications of double jeopardy?

In some cases, double jeopardy can be extremely beneficial. In others, it can be disastrous. Double jeopardy protects a person from being tried twice for the same crime. One example of an implication can be a person being proven innocent, and investigators later finding more evidence. However, once the trial has ended, the person cannot be tried a second time for the crime, regardless of any new evidence. For example, in the Casey Anthony trial, the woman was being tried for the murder of her baby daughter. She was eventually proven innocent, however, once her trial came to a end, she later admitted to the murder. Unfortunately, the trial had already occurred, and she could not be convicted due to the double jeopardy rule.