Mistrials happen when a trial in a court of law cannot continue or finish.
Mistrials are usually caused by something going wrong during the trial, and they mean the trial has to start again.
Examples:
The judge declared a mistrial because of a problem with the evidence.
The mistrial meant the whole trial had to start over.
The mistrial was bad news for the lawyers.
The mistrial was like pressing a reset button on the trial.
The mistrial was a big mess and everyone had to go back to the beginning.
The mistrial was like a big stop sign for the trial.