Final answer:
Julio cannot be tried again for the same crime of murder under the Fifth Amendment's double jeopardy clause after being found not guilty, although there are exceptions regarding different levels of government and civil cases.
Step-by-step explanation:
Under the Fifth Amendment to the Constitution, Julio cannot be tried twice for the murder of Donovan once a jury has found him not guilty. This principle is known as double jeopardy, which prevents a suspect from being prosecuted again for the same criminal act after an acquittal. Although double jeopardy prohibits a second prosecution at the same level of government, it does not prevent the federal government from trying a person for the same action if the first acquittal was at the state level.
It should be noted that double jeopardy does not apply if there is a hung jury or if the acquittal is overturned on appeal. Additionally, being acquitted in a criminal case does not prevent being sued in a civil case over the same matter, as civil trials and criminal trials are considered separate under the law.