
Case law is a vital aspect of the US legal system, providing a framework for resolving disputes and shaping future legal principles. The US Constitution establishes the Supreme Court as the highest judicial authority, with the power to review and decide on a range of cases, creating binding precedents that lower courts must follow. Below the Supreme Court are appellate courts, which interpret and apply the law, and trial courts, where cases originate and evidence and witnesses are presented. This hierarchy of courts, with their respective jurisdictions, forms the foundation of the US legal system, ensuring consistency and fairness in the application of the law. Understanding the interplay between these courts and the development of case law is essential for legal professionals and researchers alike.
| Characteristics | Values |
|---|---|
| Case law definition | A case law is a trial that could be a trial by judge or jury. |
| Trial procedure | Evidence and witnesses are presented at the trial court level. |
| Trial court decisions | Trial court decisions are rarely published in case reporters. |
| Appellate court | An appellate court hears appeals from parties seeking to change the result of the case heard at the trial court. |
| Appellate court decisions | Appellate court decisions that will be used as future precedent are published in case reporters. |
| Jurisdiction | Jurisdiction is the legal authority of a court to hear and decide a case. |
| Mandatory authority | A binding precedent is a prior decision by a court that must be followed without a compelling reason or significantly different facts or issues. |
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What You'll Learn

Mandatory vs. persuasive authority
Case law is a collection of past decisions made by judges that can be used as precedent in future cases. These past decisions can be considered mandatory or persuasive authority.
Mandatory authority refers to decisions made by higher courts in the same jurisdiction that lower courts are required to follow. For example, all federal and state courts are bound by the decisions of the U.S. Supreme Court, the highest court in the United States. Similarly, each district court falls under the jurisdiction of a circuit court and is bound by its decisions.
On the other hand, persuasive authority refers to decisions that are not binding but can be used as a reference or guide. For example, in a federal court case involving a state law issue, the decisions of the state court of appeals may be treated as persuasive authority. Additionally, when there is little or no binding authority in a particular jurisdiction, cases from outside that jurisdiction may be cited as persuasive authority.
It is important to note that while mandatory authority must be followed, persuasive authority can be used to support an argument or interpretation of the law. Persuasive authority can also be used to find cases that are binding, by using techniques such as headnote and citing reference searching.
In summary, mandatory authority refers to the binding decisions of higher courts that lower courts must follow, while persuasive authority refers to non-binding decisions that can be used as references or guides to support legal arguments and interpretations.
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Jurisdiction and court level
The court level is also crucial in determining legal authority. The U.S. court system is hierarchical, with the Supreme Court at the top, followed by 13 appellate courts or courts of appeals, and 94 district or trial courts at the lowest level. The decisions made by higher courts, such as the Supreme Court, are binding on lower courts within their jurisdiction. For instance, district courts must follow the decisions of the court of appeals that can review their cases.
Case law refers to the decisions made by appellate courts, which are used as precedents for future similar cases. These precedents are mandatory within the jurisdiction where they were issued, but they may also be considered persuasive in other jurisdictions. Trial courts, on the other hand, rarely have their decisions published as case law, as they are specific to individual cases and may not create binding precedents.
In summary, jurisdiction and court level are critical aspects of the U.S. legal system, influencing the authority of case law and the courts' decision-making processes. Understanding the interplay between jurisdiction and court level is essential for legal researchers and practitioners to navigate the complex landscape of case law and judicial authority.
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Jury trial vs. bench trial
Case law is not called trial authority. However, here is some information about jury trials and bench trials:
In the US, most trials are heard by a jury. A jury trial involves a group of people selected according to law and sworn to inquire into and declare a verdict on matters of fact. The jury's role is to be the "judge of the facts", deciding what the real facts are by hearing the case and determining what facts have been proven. In criminal cases, the jury also decides if someone is guilty or not guilty. If the jury cannot unanimously decide if the defendant is guilty, a judge may declare a mistrial, and the state can retry the case. If the jury finds the defendant not guilty, the judge dismisses the case.
However, a defendant can waive their right to a jury trial and choose a bench trial, where the case is decided by a judge alone. In a bench trial, the judge serves as both the "judge of the law" and the "judge of the facts", rendering the "guilty" or "not guilty" verdict. The decision-maker at all stages of the proceeding is the assigned judge, and all witnesses, evidence, and arguments are put forth directly to the judge.
Jury trials are often longer than bench trials due to the jury selection process, scheduling, deliberation, and managing trial elements that cannot take place in front of the jury. In a bench trial, the judge is assumed to be more equipped to observe gruesome or violent facts without emotional upset. Additionally, when dealing with technical legal matters, a bench trial may be preferable as judges are experts in criminal law and understand the burden of proof.
The right to a jury trial at the federal level is guaranteed in the United States Bill of Rights, but defendants can request to waive this right and opt for a bench trial if the judge and prosecutor (or plaintiff) agree. In state civil trials, most states recognize the right to a civil trial by jury, but defendants can waive this right in favor of a bench trial if the judge and/or plaintiff agree.
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Binding precedent
Case law is a collection of legal principles and precedents established by previous judicial decisions on specific issues. Binding precedent, based on the legal principle of stare decisis ("to stand by things decided"), requires lower courts to follow the decisions of appellate courts with authority over them. In other words, binding precedent is a prior decision by a court that must be followed without a compelling reason or significantly different facts or issues. For example, district courts are bound by the decisions of the court of appeals that can review their cases, and all courts – both state and federal – are bound by the decisions of the Supreme Court of the United States, the nation's highest court.
The ratio decidendi, or "the reason for the decision", refers to the key factual element or line of reasoning in a case that forms the basis for the court's final judgment. It is the grounds for the decisions taken in previous cases and creates binding precedent. This distinguishes it from obiter dicta, or non-binding observations or comments, which are not necessary to resolve the case at hand. While obiter dicta is not legally binding, it may be cited as persuasive authority in subsequent litigation.
In common law, precedent can be binding or persuasive. Binding precedent must be followed, while persuasive precedent is considered but not mandatory. Persuasive precedent includes decisions from courts in neighbouring jurisdictions and dicta from rulings by higher courts. Courts often turn to persuasive precedent when interpreting unclear laws or addressing "cases of first impression", where no prior binding authority exists.
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The role of the judge
A judge is a person who presides over court proceedings, either alone or as a part of a judicial panel. Judges derive their authority from a government body and are responsible for deciding lawsuits brought before the courts. They work to resolve disputes and ensure that court proceedings are lawful and orderly. In the US, the highest court is the Supreme Court, which was established by Article III of the US Constitution. There are also 13 appellate courts and 94 district or trial courts.
The role of a judge is to maintain order and ensure the fair and objective examination and cross-examination of witnesses. They must determine the legality and propriety of evidence and instruct the jury on the applicable law and standards. In bench trials, the judge determines the facts and decides the case. They also sentence convicted criminal defendants. Judges must be able to process extensive documents, testimonies, and case materials, and they must possess a thorough understanding of the law and legal procedure.
In addition, judges must remain impartial and suppress personal biases. They safeguard the rights of the accused and the interests of the public, ensuring that the trial is conducted with dignity. Judges must also respect the rights of counsel to present objections and rule on the admissibility of evidence. They should not permit any discussion of a pending case with the judge ex parte, except when authorized by law or with adequate notice to all parties.
In some cases, a defendant may proceed without counsel, and the judge should consider appointing standby counsel to assist. The judge must clearly notify the defendant and standby counsel of their respective roles. Judges are also responsible for ensuring that court proceedings are accessible and understandable to all participants, including those with disabilities or language barriers. They may also be involved in pretrial matters, such as approving search warrants or bail amounts.
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Frequently asked questions
Case law refers to the legal principles that have developed from previous court decisions.
A trial court is where a case starts. It could either be a trial by judge or jury. Evidence and witnesses are presented at this level.
An appellate court hears appeals from parties seeking to change the result of the case heard at the trial court. They do not answer questions of fact or review the evidence in a case. Instead, they rule on questions of law and consider legal issues.
Binding precedent is a prior decision by a court that must be followed without a compelling reason or significantly different facts or issues. Courts are often bound by the decisions of appellate courts with authority to review their decisions.







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