Why Do Mistrials Happen? A Legal Guide.

Mistrials are a legal concept that often sparks curiosity and raises questions among legal enthusiasts and those interested in the justice system. In the realm of law, a mistrial is an intriguing phenomenon that can occur for a variety of reasons, and understanding these reasons is essential for anyone seeking to navigate the legal landscape effectively.
This comprehensive guide aims to delve into the intricacies of mistrials, exploring the various factors that can lead to their declaration. By examining real-life examples and analyzing the legal implications, we will provide a detailed insight into why mistrials happen and their potential impact on the course of justice.
The Essence of a Mistrial

A mistrial, in its simplest form, is a trial that is terminated before its natural conclusion, without a verdict being reached. This can occur for a multitude of reasons, each of which can significantly affect the outcome of a case. It is important to note that a mistrial is not a verdict in itself; rather, it is a procedural interruption that necessitates the restarting of the trial process from a specific point.
The declaration of a mistrial can be made by the presiding judge, often in response to an objection raised by one of the parties involved in the case. This decision is not taken lightly, as it can have far-reaching consequences for all parties, including the accused, the prosecution, and the wider legal system.
Common Causes of Mistrials

Mistrials can be attributed to a wide range of factors, each with its own unique implications. Understanding these causes is crucial for legal professionals, as well as for individuals seeking to protect their rights and understand the justice system.
Juror Misconduct
One of the most common reasons for a mistrial is juror misconduct. This can take many forms, including bias, prejudice, or external influences that impact a juror’s ability to make an impartial decision. For example, if a juror conducts their own research on the case outside of the courtroom or discusses the case with someone not involved in the trial, it can lead to a mistrial.
In a high-profile case, a juror's social media activity came under scrutiny when they posted about the trial on their personal account. This brought into question their ability to remain impartial, resulting in a mistrial declaration.
Prejudicial Evidence or Testimony
The introduction of evidence or testimony that is deemed highly prejudicial can also lead to a mistrial. Prejudicial evidence is that which has a significant likelihood of influencing the jury’s decision unfairly. This could include evidence that is highly inflammatory, irrelevant to the case, or obtained through illegal means.
In a recent criminal trial, the prosecution presented evidence that had been ruled inadmissible by the court. This evidence, which suggested the defendant's involvement in unrelated criminal activities, was highly prejudicial and led to a mistrial being declared.
Judge’s Error
Mistrials can also occur due to errors made by the presiding judge. This can include giving improper instructions to the jury, making biased comments during the trial, or making a ruling that significantly affects the fairness of the proceedings.
In a civil case, the judge inadvertently revealed their personal opinion about the defendant's guilt during a sidebar conference. This led to a mistrial being declared, as the judge's comments could have influenced the jury's decision.
Hung Jury
A hung jury, also known as a deadlocked jury, occurs when the jury is unable to reach a unanimous verdict after extensive deliberation. In such cases, the judge may declare a mistrial if it becomes clear that further deliberations will not result in a verdict.
During a complex criminal trial, the jury deliberated for several days but was unable to reach a unanimous decision. The judge, after considering the jury's inability to agree, declared a mistrial, allowing the case to be retried at a later date.
Other Factors
There are several other factors that can contribute to a mistrial, including the death or serious illness of a juror, the unavailability of essential witnesses, or the discovery of new evidence that significantly impacts the case.
In a rare instance, a mistrial was declared due to the unexpected passing of a key witness during the trial. The witness's testimony was crucial to the case, and without it, the trial could not continue fairly.
Impact and Implications
The declaration of a mistrial can have significant implications for all parties involved. For the accused, it may mean the difference between a conviction and a chance at a fair trial. For the prosecution, it can result in the need to retry the case, often with additional resources and time required.
The wider legal system is also affected by mistrials. They can lead to increased costs, both financial and in terms of judicial resources, and can impact the efficiency of the justice system. Additionally, mistrials can raise questions about the effectiveness of jury trials and the ability of the legal system to deliver fair and just outcomes.
Conclusion
Mistrials are a complex and intriguing aspect of the legal system, arising from a variety of factors that can significantly impact the course of justice. By understanding the common causes and implications of mistrials, we can gain a deeper insight into the challenges and intricacies of the justice system.
As we navigate the legal landscape, it is essential to remain informed and aware of the potential pitfalls and challenges that can arise. Mistrials serve as a reminder of the importance of fairness, impartiality, and the careful administration of justice.
What happens after a mistrial is declared?
+After a mistrial is declared, the case typically returns to the pre-trial stage. This means that the parties may need to repeat certain steps, such as jury selection and the presentation of evidence. In some cases, the prosecution may choose not to retry the case, especially if the mistrial was caused by a fundamental issue with the case or if the resources required for a retrial are significant.
Can a mistrial be appealed?
+The appeal process for a mistrial can vary depending on the jurisdiction and the specific circumstances of the case. In general, a party may appeal a mistrial if they believe the judge made an error in declaring the mistrial or if they have grounds to challenge the validity of the mistrial. However, appeals in mistrial cases are not common, as the focus is often on preparing for the retrial.
Are mistrials common in the legal system?
+Mistrials are relatively rare in the legal system, as judges and legal professionals strive to ensure fair and impartial trials. However, they can occur in a variety of circumstances, as outlined in this guide. The frequency of mistrials can vary depending on the jurisdiction and the specific factors that contribute to their declaration.