Do if they are found not guilty, they cannot be tried again - Double Jeopardy clause
if the case is dismissed, they can be tried again
No, not in the US. We have the double jeopardy law that states that once the trial is over, and the accused is found not guilty, the state has no right of appeal to retry the person.
can't try person twice for same crime.
not allowed in America
It depends how strong the evidence is
No since we have laws that prevent double jeopardy
Yes ... if substantial material evidence is discovered. The prosecution has the burden of proving they are not violating Fifth Amendment Rights. Thus, for example, while OJ Simpson has been found not guilty, if he wrote a book confessing to the crime, that would likely be substantial material evidence.
NO that would be double jeopardy