A mistrial is a trial that ends without a valid verdict because a serious problem makes it impossible to continue fairly. It doesn’t mean the defendant has been found guilty or not guilty, and the case may continue with a new trial.
Why do mistrials happen?
A judge may declare a mistrial when the trial can no longer produce a fair result. Common reasons include:
- A hung jury , when jurors can’t reach the required agreement on a verdict.
- The jury hears highly prejudicial evidence that should not have been admitted.
- Serious misconduct by a lawyer, witness, judge, or juror.
- A juror is found to have concealed important information or acted improperly.
- An emergency or other extraordinary event makes continuing the trial impractical.
A mistrial isn’t declared merely because one side dislikes how the trial is going. The problem generally has to be serious enough that ordinary instructions or other corrective steps can’t protect the fairness of the proceedings.
What happens after a mistrial?
The judge ends the trial without deciding the case on its merits. In many criminal cases, prosecutors can seek a retrial before a new jury, so the proceedings may start again from the beginning.
However, a retrial isn’t automatic in every situation. Rules differ by jurisdiction, and constitutional protections such as double jeopardy can limit when the government may try the same person again. A retrial is more likely to be allowed when the mistrial was necessary because of a deadlocked jury or another serious event that made a fair trial impossible.
Is a mistrial the same as an acquittal?
No. An acquittal means the defendant has been found not guilty and generally can’t be tried again for the same offense. A conviction means the defendant has been found guilty. A mistrial usually means neither outcome was reached.
For example, if jurors remain divided after extensive deliberations, the judge may declare a mistrial. The prosecution might then decide to retry the case, negotiate a resolution, or dismiss the charges, depending on the circumstances and applicable law.