Is a hung jury and a mistrial the same thing?

No, a hung jury and a mistrial are not the same thing. A hung jury occurs when jurors cannot reach a unanimous decision, leading the court to declare a mistrial specifically due to the jury's inability to agree. A mistrial, on the other hand, can result from various factors, including procedural errors, juror misconduct, or external influences, not just a hung jury. In both cases, the trial is not concluded, and the case may be retried.